ExtensionDataElement_Element - Definitions - Extensions for Using Data Elements from FHIR STU3 in FHIR R4B v0.1.0

Extensions for Using Data Elements from FHIR STU3 in FHIR R4B - Downloaded Version null See the Directory of published versions

Extension: ExtensionDataElement_Element - Detailed Descriptions

Page standards status: Trial-use

Maturity Level: 0

Definitions for the ext-R3-DataElement.element extension.

Key Elements Table
Differential Elements Table
Snapshot Elements Table

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	STU3: `DataElement.element` additional types (ElementDefinition) additional types from child elements (alias, base, max, min, path, binding, description, strength, valueSet[x], code, comment, condition, constraint, expression, human, key, requirements, severity, source, xpath, contentReference, defaultValue[x], definition, example, label, value[x], fixed[x], isModifier, isSummary, mapping, identity, language, map, maxLength, maxValue[x], meaningWhenMissing, minValue[x], mustSupport, orderMeaning, pattern[x], representation, short, sliceName, slicing, discriminator, type, ordered, rules, aggregation, profile, targetProfile, versioning) Optional Extension Element - found in all resources.
Short	STU3: Definition of element additional typesOptional Extensions Element
Comments	Element `DataElement.element` is mapped to FHIR R4B element `StructureDefinition.differential.element` as `SourceIsBroaderThanTarget`. The mappings for `DataElement.element` do not cover the following types: ElementDefinition. The mappings for `DataElement.element` do not cover the following types based on type expansion: aggregation, alias, base, binding, code, comment, condition, constraint, contentReference, defaultValue[x], definition, description, discriminator, example, expression, fixed[x], human, identity, isModifier, isSummary, key, label, language, map, mapping, max, maxLength, maxValue[x], meaningWhenMissing, min, minValue[x], mustSupport, ordered, orderMeaning, path, pattern[x], profile, representation, requirements, rules, severity, short, sliceName, slicing, source, strength, targetProfile, type, value[x], valueSet[x], versioning, xpath. For simple data types there will only be one repetition. For complex data types, multiple repetitions will be present defining a nested structure using the "path" element.
Control	10..* This element is affected by the following invariants: ele-1
Is Modifier	false
Invariants	ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (`hasValue() or (children().count() > id.count()) or $this is Parameters`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (hasValue() or (children().count() > id.count()) or $this is Parameters) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
2. Extension.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	10..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `ElementDefinition` in FHIR R4B
Short	DataType slice for a FHIR STU3 `ElementDefinition` valueAdditional content defined by implementations
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
6. Extension.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
8. Extension.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: ElementDefinition
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`ElementDefinition`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
10. Extension.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.path`
Short	STU3: pathAdditional content defined by implementations
Comments	Element `ElementDefinition.path` is mapped to FHIR R4B element `ElementDefinition.path` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.path` is mapped to FHIR R4B element `ElementDefinition.path` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
12. Extension.extension:path.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`path`
14. Extension.extension:path.value[x]
Definition	The path identifies the element and is expressed as a "."-separated list of ancestor elements, beginning with the name of the resource or extension. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Path of the element in the hierarchy of elementsValue of extension
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. Extension.extension:representation
Slice Name	representation
Definition	STU3: `ElementDefinition.representation`
Short	STU3: representationAdditional content defined by implementations
Comments	Element `ElementDefinition.representation` is mapped to FHIR R4B element `ElementDefinition.representation` as `Equivalent`. In resources, this is rarely used except for special cases where the representation deviates from the normal, and can only be done in the base standard (and profiles must reproduce what the base standard does). This element is used quite commonly in Logical models when the logical models represent a specific serialization format (e.g. CDA, v2 etc).
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.representation` is mapped to FHIR R4B element `ElementDefinition.representation` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
18. Extension.extension:representation.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`representation`
20. Extension.extension:representation.value[x]
Definition	Codes that define how this element is represented in instances, when the deviation varies from the normal case. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	xmlAttr \| xmlText \| typeAttr \| cdaText \| xhtmlValue of extension
Comments	In resources, this is rarely used except for special cases where the representation deviates from the normal, and can only be done in the base standard (and profiles must reproduce what the base standard does). This element is used quite commonly in Logical models when the logical models represent a specific serialization format (e.g. CDA, v2 etc).
Control	0..1
Binding	The codes SHALL be taken from For codes, see PropertyRepresentation (required to `http://hl7.org/fhir/ValueSet/property-representation\|4.3.0`) How a property is represented when serialized.
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
22. Extension.extension:sliceName
Slice Name	sliceName
Definition	STU3: `ElementDefinition.sliceName`
Short	STU3: sliceNameAdditional content defined by implementations
Comments	Element `ElementDefinition.sliceName` is mapped to FHIR R4B element `ElementDefinition.sliceName` as `Equivalent`. The name SHALL be unique within the structure within the context of the constrained resource element. (Though to avoid confusion, uniqueness across all elements is recommended.).
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	May also be used for code generation purposes. Element `ElementDefinition.sliceName` is mapped to FHIR R4B element `ElementDefinition.sliceName` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
24. Extension.extension:sliceName.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`sliceName`
26. Extension.extension:sliceName.value[x]
Definition	The name of this element definition slice, when slicing is working. The name must be a token with no dots or spaces. This is a unique name referring to a specific set of constraints applied to this element, used to provide a name to different slices of the same element. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Name for this particular element (in a set of slices)Value of extension
Comments	The name SHALL be unique within the structure within the context of the constrained resource element. (Though to avoid confusion, uniqueness across all elements is recommended.).
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
28. Extension.extension:label
Slice Name	label
Definition	STU3: `ElementDefinition.label`
Short	STU3: labelAdditional content defined by implementations
Comments	Element `ElementDefinition.label` is mapped to FHIR R4B element `ElementDefinition.label` as `Equivalent`. See also the extension (http://hl7.org/fhir/StructureDefinition/elementdefinition-question)[extension-elementdefinition-question.html].
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.label` is mapped to FHIR R4B element `ElementDefinition.label` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
30. Extension.extension:label.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`label`
32. Extension.extension:label.value[x]
Definition	A single preferred label which is the text to display beside the element indicating its meaning or to use to prompt for the element in a user display or form. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Name for element to display with or prompt for elementValue of extension
Comments	See also the extension (http://hl7.org/fhir/StructureDefinition/elementdefinition-question)[extension-elementdefinition-question.html].
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
34. Extension.extension:code
Slice Name	code
Definition	STU3: `ElementDefinition.code`
Short	STU3: codeAdditional content defined by implementations
Comments	Element `ElementDefinition.code` is mapped to FHIR R4B element `ElementDefinition.code` as `Equivalent`. The concept SHALL be properly aligned with the data element definition and other constraints, as defined in the code system, including relationships, of any code listed here. Where multiple codes exist in a terminology that could correspond to the data element, the most granular code(s) should be selected, so long as they are not more restrictive than the data element itself. The mappings may be used to provide more or less granular or structured equivalences in the code system.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Links the meaning of an element to an external terminology, and is very useful for searching and indexing. Element `ElementDefinition.code` is mapped to FHIR R4B element `ElementDefinition.code` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
36. Extension.extension:code.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`code`
38. Extension.extension:code.value[x]
Definition	A code that has the same meaning as the element in a particular terminology. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Corresponding codes in terminologiesValue of extension
Comments	The concept SHALL be properly aligned with the data element definition and other constraints, as defined in the code system, including relationships, of any code listed here. Where multiple codes exist in a terminology that could correspond to the data element, the most granular code(s) should be selected, so long as they are not more restrictive than the data element itself. The mappings may be used to provide more or less granular or structured equivalences in the code system.
Control	0..1
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
40. Extension.extension:slicing
Slice Name	slicing
Definition	STU3: `ElementDefinition.slicing`
Short	STU3: slicingAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing` is mapped to FHIR R4B element `ElementDefinition.slicing` as `Equivalent`. The first element in the sequence, the one that carries the slicing, is the definition that applies to all the slices. This is based on the unconstrained element, but can apply any constraints as appropriate. This may include the common constraints on the children of the element.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing` is mapped to FHIR R4B element `ElementDefinition.slicing` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
42. Extension.extension:slicing.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	10..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
44. Extension.extension:slicing.extension:discriminator
Slice Name	discriminator
Definition	STU3: `ElementDefinition.slicing.discriminator`
Short	STU3: discriminatorAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing.discriminator` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator` as `Equivalent`. If there is no discriminator, the content is hard to process, so this should be avoided. If the base element has a cardinality of ..1, and there is a choice of types, the discriminator must be "@type".
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.discriminator` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
46. Extension.extension:slicing.extension:discriminator.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	20..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
48. Extension.extension:slicing.extension:discriminator.extension:type
Slice Name	type
Definition	STU3: `ElementDefinition.slicing.discriminator.type`
Short	STU3: typeAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing.discriminator.type` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.type` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.discriminator.type` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.type` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
50. Extension.extension:slicing.extension:discriminator.extension:type.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`type`
52. Extension.extension:slicing.extension:discriminator.extension:type.value[x]
Definition	How the element value is interpreted when discrimination is evaluated. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	value \| exists \| pattern \| type \| profileValue of extension
Control	10..1
Binding	The codes SHALL be taken from For codes, see DiscriminatorType (required to `http://hl7.org/fhir/ValueSet/discriminator-type\|4.3.0`) How an element value is interpreted when discrimination is evaluated
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
54. Extension.extension:slicing.extension:discriminator.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.slicing.discriminator.path`
Short	STU3: pathAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing.discriminator.path` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.path` as `Equivalent`. The only FHIRPath functions that are allowed are resolve(), and extension(url).
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.discriminator.path` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.path` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
56. Extension.extension:slicing.extension:discriminator.extension:path.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`path`
58. Extension.extension:slicing.extension:discriminator.extension:path.value[x]
Definition	A FHIRPath expression, using a restricted subset of FHIRPath, that is used to identify the element on which discrimination is based. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Path to element valueValue of extension
Comments	The only FHIRPath functions that are allowed are resolve(), and extension(url).
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
60. Extension.extension:slicing.extension:discriminator.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`discriminator`
62. Extension.extension:slicing.extension:discriminator.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
64. Extension.extension:slicing.extension:description
Slice Name	description
Definition	STU3: `ElementDefinition.slicing.description`
Short	STU3: descriptionAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing.description` is mapped to FHIR R4B element `ElementDefinition.slicing.description` as `Equivalent`. If it's really not possible to differentiate them, the design should be re-evaluated to make the content usable.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.description` is mapped to FHIR R4B element `ElementDefinition.slicing.description` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
66. Extension.extension:slicing.extension:description.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`description`
68. Extension.extension:slicing.extension:description.value[x]
Definition	A human-readable text description of how the slicing works. If there is no discriminator, this is required to be present to provide whatever information is possible about how the slices can be differentiated. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Text description of how slicing works (or not)Value of extension
Comments	If it's really not possible to differentiate them, the design should be re-evaluated to make the content usable.
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
70. Extension.extension:slicing.extension:ordered
Slice Name	ordered
Definition	STU3: `ElementDefinition.slicing.ordered`
Short	STU3: orderedAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing.ordered` is mapped to FHIR R4B element `ElementDefinition.slicing.ordered` as `Equivalent`. Order should only be required when it is a pressing concern for presentation. Profile authors should consider making the order a feature of the rules about the narrative, not the rules about the data - requiring ordered data makes the profile much less re-usable.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.ordered` is mapped to FHIR R4B element `ElementDefinition.slicing.ordered` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
72. Extension.extension:slicing.extension:ordered.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`ordered`
74. Extension.extension:slicing.extension:ordered.value[x]
Definition	If the matching elements have to occur in the same order as defined in the profile. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	If elements must be in same order as slicesValue of extension
Comments	Order should only be required when it is a pressing concern for presentation. Profile authors should consider making the order a feature of the rules about the narrative, not the rules about the data - requiring ordered data makes the profile much less re-usable.
Control	0..1
Type	boolean, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
76. Extension.extension:slicing.extension:rules
Slice Name	rules
Definition	STU3: `ElementDefinition.slicing.rules`
Short	STU3: rulesAdditional content defined by implementations
Comments	Element `ElementDefinition.slicing.rules` is mapped to FHIR R4B element `ElementDefinition.slicing.rules` as `Equivalent`. Allowing additional elements makes for a much for flexible template - it's open for use in wider contexts, but also means that the content of the resource is not closed, and applications have to decide how to handle content not described by the profile.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.rules` is mapped to FHIR R4B element `ElementDefinition.slicing.rules` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
78. Extension.extension:slicing.extension:rules.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`rules`
80. Extension.extension:slicing.extension:rules.value[x]
Definition	Whether additional slices are allowed or not. When the slices are ordered, profile authors can also say that additional slices are only allowed at the end. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	closed \| open \| openAtEndValue of extension
Comments	Allowing additional elements makes for a much for flexible template - it's open for use in wider contexts, but also means that the content of the resource is not closed, and applications have to decide how to handle content not described by the profile.
Control	10..1
Binding	The codes SHALL be taken from For codes, see SlicingRules (required to `http://hl7.org/fhir/ValueSet/resource-slicing-rules\|4.3.0`) How slices are interpreted when evaluating an instance.
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
82. Extension.extension:slicing.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`slicing`
84. Extension.extension:slicing.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
86. Extension.extension:short
Slice Name	short
Definition	STU3: `ElementDefinition.short`
Short	STU3: shortAdditional content defined by implementations
Comments	Element `ElementDefinition.short` is mapped to FHIR R4B element `ElementDefinition.short` as `Equivalent`. May change the term to provide language more appropriate to the context of the profile or to reflect slicing.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.short` is mapped to FHIR R4B element `ElementDefinition.short` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
88. Extension.extension:short.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`short`
90. Extension.extension:short.value[x]
Definition	A concise description of what this element means (e.g. for use in autogenerated summaries). Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Concise definition for space-constrained presentationValue of extension
Comments	May change the term to provide language more appropriate to the context of the profile or to reflect slicing.
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
92. Extension.extension:definition
Slice Name	definition
Definition	STU3: `ElementDefinition.definition`
Short	STU3: definitionAdditional content defined by implementations
Comments	Element `ElementDefinition.definition` is mapped to FHIR R4B element `ElementDefinition.definition` as `Equivalent`. It is easy for a different definition to change the meaning of an element and this can have nasty downstream consequences. Please be careful when providing definitions.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	To allow a user to state the usage of an element in a particular context. Element `ElementDefinition.definition` is mapped to FHIR R4B element `ElementDefinition.definition` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
94. Extension.extension:definition.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`definition`
96. Extension.extension:definition.value[x]
Definition	Provides a complete explanation of the meaning of the data element for human readability. For the case of elements derived from existing elements (e.g. constraints), the definition SHALL be consistent with the base definition, but convey the meaning of the element in the particular context of use of the resource. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Full formal definition as narrative textValue of extension
Comments	It is easy for a different definition to change the meaning of an element and this can have nasty downstream consequences. Please be careful when providing definitions.
Control	0..1
Type	markdown, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
98. Extension.extension:comment
Slice Name	comment
Definition	STU3: `ElementDefinition.comment`
Short	STU3: commentAdditional content defined by implementations
Comments	Element `ElementDefinition.comment` is mapped to FHIR R4B element `ElementDefinition.comment` as `Equivalent`. If it is possible to capture usage rules using constraints, that mechanism should be used in preference to this element.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.comment` is mapped to FHIR R4B element `ElementDefinition.comment` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
100. Extension.extension:comment.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`comment`
102. Extension.extension:comment.value[x]
Definition	Explanatory notes and implementation guidance about the data element, including notes about how to use the data properly, exceptions to proper use, etc. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Comments about the use of this elementValue of extension
Comments	If it is possible to capture usage rules using constraints, that mechanism should be used in preference to this element.
Control	0..1
Type	markdown, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
104. Extension.extension:requirements
Slice Name	requirements
Definition	STU3: `ElementDefinition.requirements`
Short	STU3: requirementsAdditional content defined by implementations
Comments	Element `ElementDefinition.requirements` is mapped to FHIR R4B element `ElementDefinition.requirements` as `Equivalent`. This element does not describe the usage of the element (that's done in comments), rather it's for traceability of why the element is either needed or why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this data element.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.requirements` is mapped to FHIR R4B element `ElementDefinition.requirements` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
106. Extension.extension:requirements.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`requirements`
108. Extension.extension:requirements.value[x]
Definition	This element is for traceability of why the element was created and why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this element. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Why this resource has been createdValue of extension
Comments	This element does not describe the usage of the element (that's done in comments), rather it's for traceability of why the element is either needed or why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this data element.
Control	0..1
Type	markdown, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
110. Extension.extension:alias
Slice Name	alias
Definition	STU3: `ElementDefinition.alias`
Short	STU3: aliasAdditional content defined by implementations
Comments	Element `ElementDefinition.alias` is mapped to FHIR R4B element `ElementDefinition.alias` as `Equivalent`.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allows for better easier recognition of the element by multiple communities, including international communities. Element `ElementDefinition.alias` is mapped to FHIR R4B element `ElementDefinition.alias` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
112. Extension.extension:alias.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`alias`
114. Extension.extension:alias.value[x]
Definition	Identifies additional names by which this element might also be known. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Other namesValue of extension
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
116. Extension.extension:min
Slice Name	min
Definition	STU3: `ElementDefinition.min`
Short	STU3: minAdditional content defined by implementations
Comments	Element `ElementDefinition.min` is mapped to FHIR R4B element `ElementDefinition.min` as `Equivalent`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.min` is mapped to FHIR R4B element `ElementDefinition.min` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
118. Extension.extension:min.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`min`
120. Extension.extension:min.value[x]
Definition	The minimum number of times this element SHALL appear in the instance. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Minimum CardinalityValue of extension
Control	0..1
Type	unsignedInt, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
122. Extension.extension:max
Slice Name	max
Definition	STU3: `ElementDefinition.max`
Short	STU3: maxAdditional content defined by implementations
Comments	Element `ElementDefinition.max` is mapped to FHIR R4B element `ElementDefinition.max` as `Equivalent`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.max` is mapped to FHIR R4B element `ElementDefinition.max` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
124. Extension.extension:max.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`max`
126. Extension.extension:max.value[x]
Definition	The maximum number of times this element is permitted to appear in the instance. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Maximum Cardinality (a number or *)Value of extension
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
128. Extension.extension:base
Slice Name	base
Definition	STU3: `ElementDefinition.base`
Short	STU3: baseAdditional content defined by implementations
Comments	Element `ElementDefinition.base` is mapped to FHIR R4B element `ElementDefinition.base` as `Equivalent`. The base information does not carry any information that could not be determined from the path and related profiles, but making this determination requires both that the related profiles are available, and that the algorithm to determine them be available. So they are deformalised into this location for tooling convenience, and to ensure that the base information is available without dependencies.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base` is mapped to FHIR R4B element `ElementDefinition.base` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
130. Extension.extension:base.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	30..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
132. Extension.extension:base.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.base.path`
Short	STU3: pathAdditional content defined by implementations
Comments	Element `ElementDefinition.base.path` is mapped to FHIR R4B element `ElementDefinition.base.path` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base.path` is mapped to FHIR R4B element `ElementDefinition.base.path` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
134. Extension.extension:base.extension:path.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`path`
136. Extension.extension:base.extension:path.value[x]
Definition	The Path that identifies the base element - this matches the ElementDefinition.path for that element. Across FHIR, there is only one base definition of any element - that is, an element definition on a StructureDefinition without a StructureDefinition.base. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Path that identifies the base elementValue of extension
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
138. Extension.extension:base.extension:min
Slice Name	min
Definition	STU3: `ElementDefinition.base.min`
Short	STU3: minAdditional content defined by implementations
Comments	Element `ElementDefinition.base.min` is mapped to FHIR R4B element `ElementDefinition.base.min` as `Equivalent`. This is provided for consistency with max, and may affect code generation of mandatory elements of the base resource are generated differently (some reference implementations have done this).
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base.min` is mapped to FHIR R4B element `ElementDefinition.base.min` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
140. Extension.extension:base.extension:min.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`min`
142. Extension.extension:base.extension:min.value[x]
Definition	Minimum cardinality of the base element identified by the path. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Min cardinality of the base elementValue of extension
Comments	This is provided for consistency with max, and may affect code generation of mandatory elements of the base resource are generated differently (some reference implementations have done this).
Control	10..1
Type	unsignedInt, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
144. Extension.extension:base.extension:max
Slice Name	max
Definition	STU3: `ElementDefinition.base.max`
Short	STU3: maxAdditional content defined by implementations
Comments	Element `ElementDefinition.base.max` is mapped to FHIR R4B element `ElementDefinition.base.max` as `Equivalent`. This is provided to code generation, since the serialization representation in JSON differs depending on whether the base element has max > 1. Also, some forms of code generation may differ.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base.max` is mapped to FHIR R4B element `ElementDefinition.base.max` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
146. Extension.extension:base.extension:max.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`max`
148. Extension.extension:base.extension:max.value[x]
Definition	Maximum cardinality of the base element identified by the path. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Max cardinality of the base elementValue of extension
Comments	This is provided to code generation, since the serialization representation in JSON differs depending on whether the base element has max > 1. Also, some forms of code generation may differ.
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
150. Extension.extension:base.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`base`
152. Extension.extension:base.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
154. Extension.extension:contentReference
Slice Name	contentReference
Definition	STU3: `ElementDefinition.contentReference`
Short	STU3: contentReferenceAdditional content defined by implementations
Comments	Element `ElementDefinition.contentReference` is mapped to FHIR R4B element `ElementDefinition.contentReference` as `Equivalent`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.contentReference` is mapped to FHIR R4B element `ElementDefinition.contentReference` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
156. Extension.extension:contentReference.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`contentReference`
158. Extension.extension:contentReference.value[x]
Definition	Identifies the identity of an element defined elsewhere in the profile whose content rules should be applied to the current element. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Reference to definition of content for the elementValue of extension
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
160. Extension.extension:type
Slice Name	type
Definition	STU3: `ElementDefinition.type`
Short	STU3: typeAdditional content defined by implementations
Comments	Element `ElementDefinition.type` is mapped to FHIR R4B element `ElementDefinition.type` as `Equivalent`. The Type of the element can be left blank in a differential constraint, in which case the type is inherited from the resource. Abstract types are not permitted to appear as a type when multiple types are listed. (I.e. Abstract types cannot be part of a choice).
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type` is mapped to FHIR R4B element `ElementDefinition.type` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
162. Extension.extension:type.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	10..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
164. Extension.extension:type.extension:code
Slice Name	code
Definition	STU3: `ElementDefinition.type.code`
Short	STU3: codeAdditional content defined by implementations
Comments	Element `ElementDefinition.type.code` is mapped to FHIR R4B element `ElementDefinition.type.code` as `Equivalent`. If the element is a reference to another resource, this element contains "Reference", and the targetProfile element defines what resources can be referenced. The targetProfile may be a reference to the general definition of a resource (e.g. http://hl7.org/fhir/StructureDefinition/Patient). There would be one pair of type/code for each allowed target resource type.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.code` is mapped to FHIR R4B element `ElementDefinition.type.code` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
166. Extension.extension:type.extension:code.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`code`
168. Extension.extension:type.extension:code.value[x]
Definition	URL of Data type or Resource that is a(or the) type used for this element. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition e.g. "string" is a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute URLs are only allowed in logical models. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Data type or Resource (reference to definition)Value of extension
Comments	If the element is a reference to another resource, this element contains "Reference", and the targetProfile element defines what resources can be referenced. The targetProfile may be a reference to the general definition of a resource (e.g. http://hl7.org/fhir/StructureDefinition/Patient). There would be one pair of type/code for each allowed target resource type.
Control	10..1
Binding	Unless not suitable, these codes SHALL be taken from For codes, see R3DefinedTypesForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-defined-types-for-R4B\|0.1.0`) Either a resource or a data type, including logical model types
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
170. Extension.extension:type.extension:profile
Slice Name	profile
Definition	STU3: `ElementDefinition.type.profile`
Short	STU3: Profile (StructureDefinition) to apply (or IG)Additional content defined by implementations
Comments	Element `ElementDefinition.type.profile` is mapped to FHIR R4B element `ElementDefinition.type.profile` as `SourceIsNarrowerThanTarget`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.profile` is mapped to FHIR R4B element `ElementDefinition.type.profile` as `SourceIsNarrowerThanTarget`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
172. Extension.extension:type.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
174. Extension.extension:type.extension:profile.value[x]
Definition	Identifies a profile structure or implementation Guide that SHALL hold for the datatype this element refers to. Can be a local reference - to a contained StructureDefinition, or a reference to another StructureDefinition or Implementation Guide by a canonical URL. When an implementation guide is specified, the resource SHALL conform to at least one profile defined in the implementation guide. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Profile (StructureDefinition) to apply (or IG)Value of extension
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
176. Extension.extension:type.extension:targetProfile
Slice Name	targetProfile
Definition	STU3: `ElementDefinition.type.targetProfile`
Short	STU3: Profile (StructureDefinition) to apply to reference target (or IG)Additional content defined by implementations
Comments	Element `ElementDefinition.type.targetProfile` is mapped to FHIR R4B element `ElementDefinition.type.targetProfile` as `SourceIsNarrowerThanTarget`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.targetProfile` is mapped to FHIR R4B element `ElementDefinition.type.targetProfile` as `SourceIsNarrowerThanTarget`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
178. Extension.extension:type.extension:targetProfile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`targetProfile`
180. Extension.extension:type.extension:targetProfile.value[x]
Definition	Identifies a profile structure or implementation Guide that SHALL hold for the target of the reference this element refers to. Can be a local reference - to a contained StructureDefinition, or a reference to another StructureDefinition or Implementation Guide by a canonical URL. When an implementation guide is specified, the resource SHALL conform to at least one profile defined in the implementation guide. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Profile (StructureDefinition) to apply to reference target (or IG)Value of extension
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
182. Extension.extension:type.extension:aggregation
Slice Name	aggregation
Definition	STU3: `ElementDefinition.type.aggregation`
Short	STU3: aggregationAdditional content defined by implementations
Comments	Element `ElementDefinition.type.aggregation` is mapped to FHIR R4B element `ElementDefinition.type.aggregation` as `Equivalent`.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.aggregation` is mapped to FHIR R4B element `ElementDefinition.type.aggregation` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
184. Extension.extension:type.extension:aggregation.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`aggregation`
186. Extension.extension:type.extension:aggregation.value[x]
Definition	If the type is a reference to another resource, how the resource is or can be aggregated - is it a contained resource, or a reference, and if the context is a bundle, is it included in the bundle. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	contained \| referenced \| bundled - how aggregatedValue of extension
Control	0..1
Binding	The codes SHALL be taken from For codes, see AggregationMode (required to `http://hl7.org/fhir/ValueSet/resource-aggregation-mode\|4.3.0`) How resource references can be aggregated.
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
188. Extension.extension:type.extension:versioning
Slice Name	versioning
Definition	STU3: `ElementDefinition.type.versioning`
Short	STU3: versioningAdditional content defined by implementations
Comments	Element `ElementDefinition.type.versioning` is mapped to FHIR R4B element `ElementDefinition.type.versioning` as `Equivalent`. The base specification never makes a rule as to which form is allowed, but implementation guides may do this.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.versioning` is mapped to FHIR R4B element `ElementDefinition.type.versioning` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
190. Extension.extension:type.extension:versioning.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versioning`
192. Extension.extension:type.extension:versioning.value[x]
Definition	Whether this reference needs to be version specific or version independent, or whether either can be used. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	either \| independent \| specificValue of extension
Comments	The base specification never makes a rule as to which form is allowed, but implementation guides may do this.
Control	0..1
Binding	The codes SHALL be taken from For codes, see ReferenceVersionRules (required to `http://hl7.org/fhir/ValueSet/reference-version-rules\|4.3.0`) Whether a reference needs to be version specific or version independent, or whether either can be used
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
194. Extension.extension:type.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`type`
196. Extension.extension:type.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
198. Extension.extension:defaultValue
Slice Name	defaultValue
Definition	STU3: `ElementDefinition.defaultValue[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: defaultValue additional typesAdditional content defined by implementations
Comments	Element `ElementDefinition.defaultValue[x]` is mapped to FHIR R4B element `ElementDefinition.defaultValue[x]` as `RelatedTo`. The mappings for `ElementDefinition.defaultValue[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.defaultValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Default values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. Specifying a default value means that the property can never been unknown - it must always have a value. Further, the default value can never be changed. For these reasons, default values are (and should be) used extremely sparingly.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.defaultValue[x]` is mapped to FHIR R4B element `ElementDefinition.defaultValue[x]` as `RelatedTo`. The mappings for `ElementDefinition.defaultValue[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.defaultValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
200. Extension.extension:defaultValue.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
202. Extension.extension:defaultValue.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` valueAdditional content defined by implementations
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
204. Extension.extension:defaultValue.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
206. Extension.extension:defaultValue.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
208. Extension.extension:defaultValue.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionIdAdditional content defined by implementations
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
210. Extension.extension:defaultValue.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
212. Extension.extension:defaultValue.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Version specific identifierValue of extension
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
214. Extension.extension:defaultValue.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdatedAdditional content defined by implementations
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
216. Extension.extension:defaultValue.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
218. Extension.extension:defaultValue.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	When the resource version last changedValue of extension
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
220. Extension.extension:defaultValue.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profileAdditional content defined by implementations
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
222. Extension.extension:defaultValue.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
224. Extension.extension:defaultValue.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Profiles this resource claims to conform toValue of extension
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
226. Extension.extension:defaultValue.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: securityAdditional content defined by implementations
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
228. Extension.extension:defaultValue.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
230. Extension.extension:defaultValue.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Security Labels applied to this resourceValue of extension
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from For codes, see R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
232. Extension.extension:defaultValue.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tagAdditional content defined by implementations
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
234. Extension.extension:defaultValue.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
236. Extension.extension:defaultValue.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Tags applied to this resourceValue of extension
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see For codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
238. Extension.extension:defaultValue.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`defaultValue`
240. Extension.extension:defaultValue.value[x]
Definition	The value that should be used if there is no value stated in the instance (e.g. 'if not otherwise specified, the abstract is false'). Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Specified value if missing from instanceValue of extension
Comments	Default values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. Specifying a default value means that the property can never been unknown - it must always have a value. Further, the default value can never be changed. For these reasons, default values are (and should be) used extremely sparingly.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, date, integer, Count, DataRequirement, Dosage, uuid, RatioRange, Coding, id, positiveInt, Distance, Duration, canonical, RelatedArtifact, base64Binary, UsageContext, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, Money, markdown, Age, Reference, TriggerDefinition, Quantity, uri, url, ContactDetail, boolean, Expression, CodeableReference, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
242. Extension.extension:meaningWhenMissing
Slice Name	meaningWhenMissing
Definition	STU3: `ElementDefinition.meaningWhenMissing`
Short	STU3: meaningWhenMissingAdditional content defined by implementations
Comments	Element `ElementDefinition.meaningWhenMissing` is mapped to FHIR R4B element `ElementDefinition.meaningWhenMissing` as `Equivalent`. Implicit meanings for missing values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. An implicit meaning for a missing value can never be changed, and specifying one has the consequence that constraining its use in profiles eliminates use cases as possibilities, not merely moving them out of scope.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.meaningWhenMissing` is mapped to FHIR R4B element `ElementDefinition.meaningWhenMissing` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
244. Extension.extension:meaningWhenMissing.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`meaningWhenMissing`
246. Extension.extension:meaningWhenMissing.value[x]
Definition	The Implicit meaning that is to be understood when this element is missing (e.g. 'when this element is missing, the period is ongoing'. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Implicit meaning when this element is missingValue of extension
Comments	Implicit meanings for missing values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. An implicit meaning for a missing value can never be changed, and specifying one has the consequence that constraining its use in profiles eliminates use cases as possibilities, not merely moving them out of scope.
Control	0..1
Type	markdown, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
248. Extension.extension:orderMeaning
Slice Name	orderMeaning
Definition	STU3: `ElementDefinition.orderMeaning`
Short	STU3: orderMeaningAdditional content defined by implementations
Comments	Element `ElementDefinition.orderMeaning` is mapped to FHIR R4B element `ElementDefinition.orderMeaning` as `Equivalent`. This element can only be asserted on repeating elements and can only be introduced when defining resources or data types. It can be further refined profiled elements but if absent in the base type, a profile cannot assert meaning.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.orderMeaning` is mapped to FHIR R4B element `ElementDefinition.orderMeaning` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
250. Extension.extension:orderMeaning.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`orderMeaning`
252. Extension.extension:orderMeaning.value[x]
Definition	If present, indicates that the order of the repeating element has meaning and describes what that meaning is. If absent, it means that the order of the element has no meaning. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	What the order of the elements meansValue of extension
Comments	This element can only be asserted on repeating elements and can only be introduced when defining resources or data types. It can be further refined profiled elements but if absent in the base type, a profile cannot assert meaning.
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
254. Extension.extension:fixed
Slice Name	fixed
Definition	STU3: `ElementDefinition.fixed[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: fixed additional typesAdditional content defined by implementations
Comments	Element `ElementDefinition.fixed[x]` is mapped to FHIR R4B element `ElementDefinition.fixed[x]` as `RelatedTo`. The mappings for `ElementDefinition.fixed[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.fixed[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. This is not recommended for Coding and CodeableConcept since these often have highly contextual properties such as version or display.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.fixed[x]` is mapped to FHIR R4B element `ElementDefinition.fixed[x]` as `RelatedTo`. The mappings for `ElementDefinition.fixed[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.fixed[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
256. Extension.extension:fixed.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
258. Extension.extension:fixed.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` valueAdditional content defined by implementations
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
260. Extension.extension:fixed.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
262. Extension.extension:fixed.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
264. Extension.extension:fixed.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionIdAdditional content defined by implementations
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
266. Extension.extension:fixed.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
268. Extension.extension:fixed.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Version specific identifierValue of extension
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
270. Extension.extension:fixed.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdatedAdditional content defined by implementations
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
272. Extension.extension:fixed.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
274. Extension.extension:fixed.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	When the resource version last changedValue of extension
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
276. Extension.extension:fixed.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profileAdditional content defined by implementations
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
278. Extension.extension:fixed.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
280. Extension.extension:fixed.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Profiles this resource claims to conform toValue of extension
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
282. Extension.extension:fixed.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: securityAdditional content defined by implementations
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
284. Extension.extension:fixed.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
286. Extension.extension:fixed.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Security Labels applied to this resourceValue of extension
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from For codes, see R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
288. Extension.extension:fixed.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tagAdditional content defined by implementations
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
290. Extension.extension:fixed.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
292. Extension.extension:fixed.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Tags applied to this resourceValue of extension
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see For codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
294. Extension.extension:fixed.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`fixed`
296. Extension.extension:fixed.value[x]
Definition	Specifies a value that SHALL be exactly the value for this element in the instance. For purposes of comparison, non-significant whitespace is ignored, and all values must be an exact match (case and accent sensitive). Missing elements/attributes must also be missing. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value must be exactly thisValue of extension
Comments	This is not recommended for Coding and CodeableConcept since these often have highly contextual properties such as version or display.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, date, integer, Count, DataRequirement, Dosage, uuid, RatioRange, Coding, id, positiveInt, Distance, Duration, canonical, RelatedArtifact, base64Binary, UsageContext, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, Money, markdown, Age, Reference, TriggerDefinition, Quantity, uri, url, ContactDetail, boolean, Expression, CodeableReference, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
298. Extension.extension:pattern
Slice Name	pattern
Definition	STU3: `ElementDefinition.pattern[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: pattern additional typesAdditional content defined by implementations
Comments	Element `ElementDefinition.pattern[x]` is mapped to FHIR R4B element `ElementDefinition.pattern[x]` as `RelatedTo`. The mappings for `ElementDefinition.pattern[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.pattern[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Mostly used for fixing values of CodeableConcept. At present, pattern[x] is not recommended as a basis for slicing while issues related to this are investigated during the STU period.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.pattern[x]` is mapped to FHIR R4B element `ElementDefinition.pattern[x]` as `RelatedTo`. The mappings for `ElementDefinition.pattern[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.pattern[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
300. Extension.extension:pattern.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
302. Extension.extension:pattern.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` valueAdditional content defined by implementations
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
304. Extension.extension:pattern.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
306. Extension.extension:pattern.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
308. Extension.extension:pattern.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionIdAdditional content defined by implementations
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
310. Extension.extension:pattern.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
312. Extension.extension:pattern.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Version specific identifierValue of extension
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
314. Extension.extension:pattern.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdatedAdditional content defined by implementations
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
316. Extension.extension:pattern.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
318. Extension.extension:pattern.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	When the resource version last changedValue of extension
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
320. Extension.extension:pattern.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profileAdditional content defined by implementations
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
322. Extension.extension:pattern.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
324. Extension.extension:pattern.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Profiles this resource claims to conform toValue of extension
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
326. Extension.extension:pattern.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: securityAdditional content defined by implementations
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
328. Extension.extension:pattern.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
330. Extension.extension:pattern.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Security Labels applied to this resourceValue of extension
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from For codes, see R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
332. Extension.extension:pattern.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tagAdditional content defined by implementations
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
334. Extension.extension:pattern.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
336. Extension.extension:pattern.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Tags applied to this resourceValue of extension
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see For codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
338. Extension.extension:pattern.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`pattern`
340. Extension.extension:pattern.value[x]
Definition	Specifies a value that the value in the instance SHALL follow - that is, any value in the pattern must be found in the instance. Other additional values may be found too. This is effectively constraint by example. The values of elements present in the pattern must match exactly (case-sensitive, accent-sensitive, etc.). Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value must have at least these property valuesValue of extension
Comments	Mostly used for fixing values of CodeableConcept. At present, pattern[x] is not recommended as a basis for slicing while issues related to this are investigated during the STU period.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, date, integer, Count, DataRequirement, Dosage, uuid, RatioRange, Coding, id, positiveInt, Distance, Duration, canonical, RelatedArtifact, base64Binary, UsageContext, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, Money, markdown, Age, Reference, TriggerDefinition, Quantity, uri, url, ContactDetail, boolean, Expression, CodeableReference, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
342. Extension.extension:example
Slice Name	example
Definition	STU3: `ElementDefinition.example`
Short	STU3: exampleAdditional content defined by implementations
Comments	Element `ElementDefinition.example` is mapped to FHIR R4B element `ElementDefinition.example` as `Equivalent`. Examples will most commonly be present for data where it's not implicitly obvious from either the data type or value set what the values might be. (I.e. Example values for dates or quantities would generally be unnecessary.) If the example value is fully populated, the publication tool can generate an instance automatically.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.example` is mapped to FHIR R4B element `ElementDefinition.example` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
344. Extension.extension:example.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	20..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
346. Extension.extension:example.extension:label
Slice Name	label
Definition	STU3: `ElementDefinition.example.label`
Short	STU3: labelAdditional content defined by implementations
Comments	Element `ElementDefinition.example.label` is mapped to FHIR R4B element `ElementDefinition.example.label` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.example.label` is mapped to FHIR R4B element `ElementDefinition.example.label` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
348. Extension.extension:example.extension:label.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`label`
350. Extension.extension:example.extension:label.value[x]
Definition	Describes the purpose of this example amoung the set of examples. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Describes the purpose of this exampleValue of extension
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
352. Extension.extension:example.extension:value
Slice Name	value
Definition	STU3: `ElementDefinition.example.value[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: value additional typesAdditional content defined by implementations
Comments	Element `ElementDefinition.example.value[x]` is mapped to FHIR R4B element `ElementDefinition.example.value[x]` as `RelatedTo`. The mappings for `ElementDefinition.example.value[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.example.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition.example`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.example.value[x]` is mapped to FHIR R4B element `ElementDefinition.example.value[x]` as `RelatedTo`. The mappings for `ElementDefinition.example.value[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.example.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition.example`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
354. Extension.extension:example.extension:value.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	10..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
356. Extension.extension:example.extension:value.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` valueAdditional content defined by implementations
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
358. Extension.extension:example.extension:value.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
360. Extension.extension:example.extension:value.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
362. Extension.extension:example.extension:value.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionIdAdditional content defined by implementations
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
364. Extension.extension:example.extension:value.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
366. Extension.extension:example.extension:value.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Version specific identifierValue of extension
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
368. Extension.extension:example.extension:value.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdatedAdditional content defined by implementations
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
370. Extension.extension:example.extension:value.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
372. Extension.extension:example.extension:value.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	When the resource version last changedValue of extension
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
374. Extension.extension:example.extension:value.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profileAdditional content defined by implementations
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
376. Extension.extension:example.extension:value.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
378. Extension.extension:example.extension:value.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Profiles this resource claims to conform toValue of extension
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
380. Extension.extension:example.extension:value.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: securityAdditional content defined by implementations
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
382. Extension.extension:example.extension:value.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
384. Extension.extension:example.extension:value.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Security Labels applied to this resourceValue of extension
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from For codes, see R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
386. Extension.extension:example.extension:value.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tagAdditional content defined by implementations
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
388. Extension.extension:example.extension:value.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
390. Extension.extension:example.extension:value.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Tags applied to this resourceValue of extension
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see For codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
392. Extension.extension:example.extension:value.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`value`
394. Extension.extension:example.extension:value.value[x]
Definition	The actual value for the element, which must be one of the types allowed for this element. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of Example (one of allowed types)Value of extension
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, date, integer, Count, DataRequirement, Dosage, uuid, RatioRange, Coding, id, positiveInt, Distance, Duration, canonical, RelatedArtifact, base64Binary, UsageContext, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, Money, markdown, Age, Reference, TriggerDefinition, Quantity, uri, url, ContactDetail, boolean, Expression, CodeableReference, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
396. Extension.extension:example.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`example`
398. Extension.extension:example.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
400. Extension.extension:minValue
Slice Name	minValue
Definition	STU3: `ElementDefinition.minValue[x]`
Short	STU3: minValueAdditional content defined by implementations
Comments	Element `ElementDefinition.minValue[x]` is mapped to FHIR R4B element `ElementDefinition.minValue[x]` as `RelatedTo`. The target context `ElementDefinition.minValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Except for date/date/instant, the type of the minValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of minValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is subtracted from the current clock to determine the minimum allowable value. A minimum value for a Quantity is interpreted as an canonical minimum - e.g. you cannot provide 100mg if the minimum value is 10g.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.minValue[x]` is mapped to FHIR R4B element `ElementDefinition.minValue[x]` as `RelatedTo`. The target context `ElementDefinition.minValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
402. Extension.extension:minValue.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`minValue`
404. Extension.extension:minValue.value[x]
Definition	The minimum allowed value for the element. The value is inclusive. This is allowed for the types date, dateTime, instant, time, decimal, integer, and Quantity. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Minimum Allowed Value (for some types)Value of extension
Comments	Except for date/date/instant, the type of the minValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of minValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is subtracted from the current clock to determine the minimum allowable value. A minimum value for a Quantity is interpreted as an canonical minimum - e.g. you cannot provide 100mg if the minimum value is 10g.
Control	0..1
Type	Choice of: date, dateTime, instant, time, decimal, integer, positiveInt, unsignedInt, Quantity, Address, Attachment, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, CodeableConcept, ParameterDefinition, code, string, Contributor, oid, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
406. Extension.extension:maxValue
Slice Name	maxValue
Definition	STU3: `ElementDefinition.maxValue[x]`
Short	STU3: maxValueAdditional content defined by implementations
Comments	Element `ElementDefinition.maxValue[x]` is mapped to FHIR R4B element `ElementDefinition.maxValue[x]` as `RelatedTo`. The target context `ElementDefinition.maxValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Except for date/date/instant, the type of the maxValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of maxValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is added to the current clock to determine the maximum allowable value. A maximum value for a Quantity is interpreted as an canonical maximum - e.g. you cannot provide 10g if the maximum value is 50mg.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.maxValue[x]` is mapped to FHIR R4B element `ElementDefinition.maxValue[x]` as `RelatedTo`. The target context `ElementDefinition.maxValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
408. Extension.extension:maxValue.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`maxValue`
410. Extension.extension:maxValue.value[x]
Definition	The maximum allowed value for the element. The value is inclusive. This is allowed for the types date, dateTime, instant, time, decimal, integer, and Quantity. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Maximum Allowed Value (for some types)Value of extension
Comments	Except for date/date/instant, the type of the maxValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of maxValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is added to the current clock to determine the maximum allowable value. A maximum value for a Quantity is interpreted as an canonical maximum - e.g. you cannot provide 10g if the maximum value is 50mg.
Control	0..1
Type	Choice of: date, dateTime, instant, time, decimal, integer, positiveInt, unsignedInt, Quantity, Address, Attachment, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, CodeableConcept, ParameterDefinition, code, string, Contributor, oid, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
412. Extension.extension:maxLength
Slice Name	maxLength
Definition	STU3: `ElementDefinition.maxLength`
Short	STU3: maxLengthAdditional content defined by implementations
Comments	Element `ElementDefinition.maxLength` is mapped to FHIR R4B element `ElementDefinition.maxLength` as `Equivalent`. Receivers are not required to reject instances that exceed the maximum length. The full length could be stored. In some cases, data might be truncated, though truncation should be undertaken with care and an understanding of the consequences of doing so. If not specified, there is no conformance expectation for length support.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.maxLength` is mapped to FHIR R4B element `ElementDefinition.maxLength` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
414. Extension.extension:maxLength.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`maxLength`
416. Extension.extension:maxLength.value[x]
Definition	Indicates the maximum length in characters that is permitted to be present in conformant instances and which is expected to be supported by conformant consumers that support the element. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Max length for stringsValue of extension
Comments	Receivers are not required to reject instances that exceed the maximum length. The full length could be stored. In some cases, data might be truncated, though truncation should be undertaken with care and an understanding of the consequences of doing so. If not specified, there is no conformance expectation for length support.
Control	0..1
Type	integer, date, Address, Attachment, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
418. Extension.extension:condition
Slice Name	condition
Definition	STU3: `ElementDefinition.condition`
Short	STU3: conditionAdditional content defined by implementations
Comments	Element `ElementDefinition.condition` is mapped to FHIR R4B element `ElementDefinition.condition` as `Equivalent`.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.condition` is mapped to FHIR R4B element `ElementDefinition.condition` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
420. Extension.extension:condition.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`condition`
422. Extension.extension:condition.value[x]
Definition	A reference to an invariant that may make additional statements about the cardinality or value in the instance. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Reference to invariant about presenceValue of extension
Control	0..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
424. Extension.extension:constraint
Slice Name	constraint
Definition	STU3: `ElementDefinition.constraint`
Short	STU3: constraintAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint` is mapped to FHIR R4B element `ElementDefinition.constraint` as `Equivalent`. Constraints should be declared on the "context" element - the lowest element in the hierarchy that is common to all nodes referenced by the constraint.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint` is mapped to FHIR R4B element `ElementDefinition.constraint` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
426. Extension.extension:constraint.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	40..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
428. Extension.extension:constraint.extension:key
Slice Name	key
Definition	STU3: `ElementDefinition.constraint.key`
Short	STU3: keyAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.key` is mapped to FHIR R4B element `ElementDefinition.constraint.key` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.key` is mapped to FHIR R4B element `ElementDefinition.constraint.key` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
430. Extension.extension:constraint.extension:key.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`key`
432. Extension.extension:constraint.extension:key.value[x]
Definition	Allows identification of which elements have their cardinalities impacted by the constraint. Will not be referenced for constraints that do not affect cardinality. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Target of 'condition' reference aboveValue of extension
Control	10..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
434. Extension.extension:constraint.extension:requirements
Slice Name	requirements
Definition	STU3: `ElementDefinition.constraint.requirements`
Short	STU3: requirementsAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.requirements` is mapped to FHIR R4B element `ElementDefinition.constraint.requirements` as `Equivalent`. To be used if the reason for the constraint may not be intuitive to all implementers.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.requirements` is mapped to FHIR R4B element `ElementDefinition.constraint.requirements` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
436. Extension.extension:constraint.extension:requirements.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`requirements`
438. Extension.extension:constraint.extension:requirements.value[x]
Definition	Description of why this constraint is necessary or appropriate. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Why this constraint is necessary or appropriateValue of extension
Comments	To be used if the reason for the constraint may not be intuitive to all implementers.
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
440. Extension.extension:constraint.extension:severity
Slice Name	severity
Definition	STU3: `ElementDefinition.constraint.severity`
Short	STU3: severityAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.severity` is mapped to FHIR R4B element `ElementDefinition.constraint.severity` as `Equivalent`. This allows constraints to be asserted as "shall" (error) and "should" (warning).
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.severity` is mapped to FHIR R4B element `ElementDefinition.constraint.severity` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
442. Extension.extension:constraint.extension:severity.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`severity`
444. Extension.extension:constraint.extension:severity.value[x]
Definition	Identifies the impact constraint violation has on the conformance of the instance. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	error \| warningValue of extension
Comments	This allows constraints to be asserted as "shall" (error) and "should" (warning).
Control	10..1
Binding	The codes SHALL be taken from For codes, see ConstraintSeverity (required to `http://hl7.org/fhir/ValueSet/constraint-severity\|4.3.0`) SHALL applications comply with this constraint?
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
446. Extension.extension:constraint.extension:human
Slice Name	human
Definition	STU3: `ElementDefinition.constraint.human`
Short	STU3: humanAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.human` is mapped to FHIR R4B element `ElementDefinition.constraint.human` as `Equivalent`. Should be expressed in business terms as much as possible.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.human` is mapped to FHIR R4B element `ElementDefinition.constraint.human` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
448. Extension.extension:constraint.extension:human.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`human`
450. Extension.extension:constraint.extension:human.value[x]
Definition	Text that can be used to describe the constraint in messages identifying that the constraint has been violated. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Human description of constraintValue of extension
Comments	Should be expressed in business terms as much as possible.
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
452. Extension.extension:constraint.extension:expression
Slice Name	expression
Definition	STU3: `ElementDefinition.constraint.expression`
Short	STU3: expressionAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.expression` is mapped to FHIR R4B element `ElementDefinition.constraint.expression` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Used by validation tooling tests of the validity of the resource. Element `ElementDefinition.constraint.expression` is mapped to FHIR R4B element `ElementDefinition.constraint.expression` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
454. Extension.extension:constraint.extension:expression.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`expression`
456. Extension.extension:constraint.extension:expression.value[x]
Definition	A FHIRPath expression of constraint that can be executed to see if this constraint is met. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	FHIRPath expression of constraintValue of extension
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
458. Extension.extension:constraint.extension:xpath
Slice Name	xpath
Definition	STU3: `ElementDefinition.constraint.xpath`
Short	STU3: xpathAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.xpath` is mapped to FHIR R4B element `ElementDefinition.constraint.xpath` as `Equivalent`. Elements SHALL use "f" as the namespace prefix for the FHIR namespace, and "x" for the xhtml namespace, and SHALL NOT use any other prefixes. Note: we are considering deprecating the xpath element. Implementer feedback is welcome.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Used in Schematron tests of the validity of the resource. Element `ElementDefinition.constraint.xpath` is mapped to FHIR R4B element `ElementDefinition.constraint.xpath` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
460. Extension.extension:constraint.extension:xpath.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`xpath`
462. Extension.extension:constraint.extension:xpath.value[x]
Definition	An XPath expression of constraint that can be executed to see if this constraint is met. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	XPath expression of constraintValue of extension
Comments	Elements SHALL use "f" as the namespace prefix for the FHIR namespace, and "x" for the xhtml namespace, and SHALL NOT use any other prefixes. Note: we are considering deprecating the xpath element. Implementer feedback is welcome.
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
464. Extension.extension:constraint.extension:source
Slice Name	source
Definition	STU3: `ElementDefinition.constraint.source`
Short	STU3: sourceAdditional content defined by implementations
Comments	Element `ElementDefinition.constraint.source` is mapped to FHIR R4B element `ElementDefinition.constraint.source` as `Equivalent`. This is used when, e.g. rendering, where it is not useful to present inherited constraints when rendering the snapshot.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.source` is mapped to FHIR R4B element `ElementDefinition.constraint.source` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
466. Extension.extension:constraint.extension:source.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`source`
468. Extension.extension:constraint.extension:source.value[x]
Definition	A reference to the original source of the constraint, for traceability purposes. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Reference to original source of constraintValue of extension
Comments	This is used when, e.g. rendering, where it is not useful to present inherited constraints when rendering the snapshot.
Control	0..1
Type	uri, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
470. Extension.extension:constraint.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`constraint`
472. Extension.extension:constraint.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
474. Extension.extension:mustSupport
Slice Name	mustSupport
Definition	STU3: `ElementDefinition.mustSupport`
Short	STU3: If the element must supportedAdditional content defined by implementations
Comments	Element `ElementDefinition.mustSupport` is mapped to FHIR R4B element `ElementDefinition.mustSupport` as `Equivalent`. "Something useful" is context dependent and impossible to describe in the base FHIR specification. For this reason, tue mustSupport flag is never set to true by the FHIR specification itself - it is only set to true in profiles. This is done in Resource Profiles, where the profile labels an element as mustSupport=true. When a profile does this, it SHALL also make clear exactly what kind of "support" is required, as this can mean many things. Note that an element that has the property IsModifier is not necessarily a "key" element (e.g. one of the important elements to make use of the resource), nor is it automatically mustSupport - however both of these things are more likely to be true for IsModifier elements than for other elements.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allows a profile to set expectations for system capabilities beyond merely respecting cardinality constraints. Element `ElementDefinition.mustSupport` is mapped to FHIR R4B element `ElementDefinition.mustSupport` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
476. Extension.extension:mustSupport.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`mustSupport`
478. Extension.extension:mustSupport.value[x]
Definition	If true, implementations that produce or consume resources SHALL provide "support" for the element in some meaningful way. If false, the element may be ignored and not supported. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	If the element must supportedValue of extension
Comments	"Something useful" is context dependent and impossible to describe in the base FHIR specification. For this reason, tue mustSupport flag is never set to true by the FHIR specification itself - it is only set to true in profiles. This is done in Resource Profiles, where the profile labels an element as mustSupport=true. When a profile does this, it SHALL also make clear exactly what kind of "support" is required, as this can mean many things. Note that an element that has the property IsModifier is not necessarily a "key" element (e.g. one of the important elements to make use of the resource), nor is it automatically mustSupport - however both of these things are more likely to be true for IsModifier elements than for other elements.
Control	0..1
Type	boolean, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
480. Extension.extension:isModifier
Slice Name	isModifier
Definition	STU3: `ElementDefinition.isModifier`
Short	STU3: isModifierAdditional content defined by implementations
Comments	Element `ElementDefinition.isModifier` is mapped to FHIR R4B element `ElementDefinition.isModifier` as `Equivalent`. Only the definition of an element can set IsModifier true - either the specification itself or where an extension is originally defined. Once set, it cannot be changed in derived profiles. An element/extension that has isModifier=true SHOULD also have a minimum cardinality of 1, so that there is no lack of clarity about what to do if it is missing. If it can be missing, the definition SHALL make the meaning of a missing element clear.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allows elements to be introduced into a specification that can't safely be ignored by applications that don't recognize them. Element `ElementDefinition.isModifier` is mapped to FHIR R4B element `ElementDefinition.isModifier` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
482. Extension.extension:isModifier.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`isModifier`
484. Extension.extension:isModifier.value[x]
Definition	If true, the value of this element affects the interpretation of the element or resource that contains it, and the value of the element cannot be ignored. Typically, this is used for status, negation and qualification codes. The effect of this is that the element cannot be ignored by systems: they SHALL either recognize the element and process it, and/or a pre-determination has been made that it is not relevant to their particular system. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	If this modifies the meaning of other elementsValue of extension
Comments	Only the definition of an element can set IsModifier true - either the specification itself or where an extension is originally defined. Once set, it cannot be changed in derived profiles. An element/extension that has isModifier=true SHOULD also have a minimum cardinality of 1, so that there is no lack of clarity about what to do if it is missing. If it can be missing, the definition SHALL make the meaning of a missing element clear.
Control	0..1
Type	boolean, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
486. Extension.extension:isSummary
Slice Name	isSummary
Definition	STU3: `ElementDefinition.isSummary`
Short	STU3: isSummaryAdditional content defined by implementations
Comments	Element `ElementDefinition.isSummary` is mapped to FHIR R4B element `ElementDefinition.isSummary` as `Equivalent`. Some resources include a set of simple metadata, and some very large data. This element is used to reduce the quantity of data returned in searches. Note that servers may pre-cache summarized resources for optimal performance, so servers may not support per-profile use of the isSummary flag. When a request is made with _summary=true, serailisers only include elements marked as 'isSummary = true'. Other than Attachment.data, all data type properties are included in the summary form. Modifier elements or elements with minimum cardinality = 1 must be marked as summary elements.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allow clients to search through large resources quickly. Element `ElementDefinition.isSummary` is mapped to FHIR R4B element `ElementDefinition.isSummary` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
488. Extension.extension:isSummary.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`isSummary`
490. Extension.extension:isSummary.value[x]
Definition	Whether the element should be included if a client requests a search with the parameter _summary=true. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Include when _summary = true?Value of extension
Comments	Some resources include a set of simple metadata, and some very large data. This element is used to reduce the quantity of data returned in searches. Note that servers may pre-cache summarized resources for optimal performance, so servers may not support per-profile use of the isSummary flag. When a request is made with _summary=true, serailisers only include elements marked as 'isSummary = true'. Other than Attachment.data, all data type properties are included in the summary form. Modifier elements or elements with minimum cardinality = 1 must be marked as summary elements.
Control	0..1
Type	boolean, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
492. Extension.extension:binding
Slice Name	binding
Definition	STU3: `ElementDefinition.binding`
Short	STU3: bindingAdditional content defined by implementations
Comments	Element `ElementDefinition.binding` is mapped to FHIR R4B element `ElementDefinition.binding` as `Equivalent`. For a CodeableConcept, when no codes are allowed - only text, use a binding of strength "required" with a description explaining that no coded values are allowed and what sort of information to put in the "text" element.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding` is mapped to FHIR R4B element `ElementDefinition.binding` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
494. Extension.extension:binding.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	10..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
496. Extension.extension:binding.extension:strength
Slice Name	strength
Definition	STU3: `ElementDefinition.binding.strength`
Short	STU3: strengthAdditional content defined by implementations
Comments	Element `ElementDefinition.binding.strength` is mapped to FHIR R4B element `ElementDefinition.binding.strength` as `Equivalent`. For further discussion, see Using Terminologies.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding.strength` is mapped to FHIR R4B element `ElementDefinition.binding.strength` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
498. Extension.extension:binding.extension:strength.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`strength`
500. Extension.extension:binding.extension:strength.value[x]
Definition	Indicates the degree of conformance expectations associated with this binding - that is, the degree to which the provided value set must be adhered to in the instances. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	required \| extensible \| preferred \| exampleValue of extension
Comments	For further discussion, see Using Terminologies.
Control	10..1
Binding	The codes SHALL be taken from For codes, see BindingStrength (required to `http://hl7.org/fhir/ValueSet/binding-strength\|4.3.0`) Indication of the degree of conformance expectations associated with a binding.
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
502. Extension.extension:binding.extension:description
Slice Name	description
Definition	STU3: `ElementDefinition.binding.description`
Short	STU3: descriptionAdditional content defined by implementations
Comments	Element `ElementDefinition.binding.description` is mapped to FHIR R4B element `ElementDefinition.binding.description` as `Equivalent`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding.description` is mapped to FHIR R4B element `ElementDefinition.binding.description` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
504. Extension.extension:binding.extension:description.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`description`
506. Extension.extension:binding.extension:description.value[x]
Definition	Describes the intended use of this particular set of codes. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Human explanation of the value setValue of extension
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
508. Extension.extension:binding.extension:valueSet
Slice Name	valueSet
Definition	STU3: `ElementDefinition.binding.valueSet[x]` additional types (Reference(http://hl7.org/fhir/StructureDefinition/ValueSet)) additional types from child elements (display, identifier, reference)
Short	STU3: Source of value set additional typesAdditional content defined by implementations
Comments	Element `ElementDefinition.binding.valueSet[x]` is mapped to FHIR R4B element `ElementDefinition.binding.valueSet` as `SourceIsBroaderThanTarget`. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types: Reference. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types based on type expansion: display, identifier, reference. For value sets with a referenceResource, the display can contain the value set description. The reference may be version-specific or not.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding.valueSet[x]` is mapped to FHIR R4B element `ElementDefinition.binding.valueSet` as `SourceIsBroaderThanTarget`. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types: Reference. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types based on type expansion: display, identifier, reference.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
510. Extension.extension:binding.extension:valueSet.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`valueSet`
512. Extension.extension:binding.extension:valueSet.value[x]
Definition	Points to the value set or external definition (e.g. implicit value set) that identifies the set of codes to be used. If the binding refers to an explicit value set - the normal case - then use a Reference(ValueSet) preferably containing the canonical URL for the value set. If the reference is to an implicit value set - usually, an IETF RFC that defines a grammar, such as mime types - then use a uri. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Source of value setValue of extension
Comments	For value sets with a referenceResource, the display can contain the value set description. The reference may be version-specific or not.
Control	0..1
Type	Reference(Cross-version Profile for STU3.ValueSet for use in FHIR R4B, ValueSet), date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
514. Extension.extension:binding.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`binding`
516. Extension.extension:binding.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
518. Extension.extension:mapping
Slice Name	mapping
Definition	STU3: `ElementDefinition.mapping`
Short	STU3: mappingAdditional content defined by implementations
Comments	Element `ElementDefinition.mapping` is mapped to FHIR R4B element `ElementDefinition.mapping` as `Equivalent`. Mappings are not necessarily specific enough for safe translation.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Provides guidance to implementers familiar with or converting content from other specifications. Element `ElementDefinition.mapping` is mapped to FHIR R4B element `ElementDefinition.mapping` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
520. Extension.extension:mapping.extension
Definition	An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	ExtensionAdditional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	20..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
522. Extension.extension:mapping.extension:identity
Slice Name	identity
Definition	STU3: `ElementDefinition.mapping.identity`
Short	STU3: identityAdditional content defined by implementations
Comments	Element `ElementDefinition.mapping.identity` is mapped to FHIR R4B element `ElementDefinition.mapping.identity` as `Equivalent`.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.identity` is mapped to FHIR R4B element `ElementDefinition.mapping.identity` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
524. Extension.extension:mapping.extension:identity.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`identity`
526. Extension.extension:mapping.extension:identity.value[x]
Definition	An internal reference to the definition of a mapping. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Reference to mapping declarationValue of extension
Control	10..1
Type	id, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
528. Extension.extension:mapping.extension:language
Slice Name	language
Definition	STU3: `ElementDefinition.mapping.language`
Short	STU3: languageAdditional content defined by implementations
Comments	Element `ElementDefinition.mapping.language` is mapped to FHIR R4B element `ElementDefinition.mapping.language` as `Equivalent`. If omitted, then there can be no expectation of computational interpretation of the mapping.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.language` is mapped to FHIR R4B element `ElementDefinition.mapping.language` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
530. Extension.extension:mapping.extension:language.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`language`
532. Extension.extension:mapping.extension:language.value[x]
Definition	Identifies the computable language in which mapping.map is expressed. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Computable language of mappingValue of extension
Comments	If omitted, then there can be no expectation of computational interpretation of the mapping.
Control	0..1
Type	code, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
534. Extension.extension:mapping.extension:map
Slice Name	map
Definition	STU3: `ElementDefinition.mapping.map`
Short	STU3: mapAdditional content defined by implementations
Comments	Element `ElementDefinition.mapping.map` is mapped to FHIR R4B element `ElementDefinition.mapping.map` as `Equivalent`. For most mappings, the syntax is undefined. Syntax will be provided for mappings to the RIM. Multiple mappings may be possible and may include constraints on other resource elements that identify when a particular mapping applies.
Control	10..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.map` is mapped to FHIR R4B element `ElementDefinition.mapping.map` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
536. Extension.extension:mapping.extension:map.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`map`
538. Extension.extension:mapping.extension:map.value[x]
Definition	Expresses what part of the target specification corresponds to this element. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Details of the mappingValue of extension
Comments	For most mappings, the syntax is undefined. Syntax will be provided for mappings to the RIM. Multiple mappings may be possible and may include constraints on other resource elements that identify when a particular mapping applies.
Control	10..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
540. Extension.extension:mapping.extension:comment
Slice Name	comment
Definition	STU3: `ElementDefinition.mapping.comment`
Short	STU3: commentAdditional content defined by implementations
Comments	Element `ElementDefinition.mapping.comment` is mapped to FHIR R4B element `ElementDefinition.mapping.comment` as `Equivalent`.
Control	0..1*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.comment` is mapped to FHIR R4B element `ElementDefinition.mapping.comment` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
542. Extension.extension:mapping.extension:comment.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`comment`
544. Extension.extension:mapping.extension:comment.value[x]
Definition	Comments that provide information about the mapping or its use. Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Comments about the mapping or its useValue of extension
Control	0..1
Type	string, date, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, RatioRange, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, CodeableReference, Signature, unsignedInt, time
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
546. Extension.extension:mapping.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`mapping`
548. Extension.extension:mapping.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
550. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/3.0/StructureDefinition/extension-DataElement.element`
552. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	STU3: `DataElement.element` additional types (ElementDefinition) additional types from child elements (alias, base, max, min, path, binding, description, strength, valueSet[x], code, comment, condition, constraint, expression, human, key, requirements, severity, source, xpath, contentReference, defaultValue[x], definition, example, label, value[x], fixed[x], isModifier, isSummary, mapping, identity, language, map, maxLength, maxValue[x], meaningWhenMissing, minValue[x], mustSupport, orderMeaning, pattern[x], representation, short, sliceName, slicing, discriminator, type, ordered, rules, aggregation, profile, targetProfile, versioning)
Short	STU3: Definition of element additional types
Comments	Element `DataElement.element` is mapped to FHIR R4B element `StructureDefinition.differential.element` as `SourceIsBroaderThanTarget`. The mappings for `DataElement.element` do not cover the following types: ElementDefinition. The mappings for `DataElement.element` do not cover the following types based on type expansion: aggregation, alias, base, binding, code, comment, condition, constraint, contentReference, defaultValue[x], definition, description, discriminator, example, expression, fixed[x], human, identity, isModifier, isSummary, key, label, language, map, mapping, max, maxLength, maxValue[x], meaningWhenMissing, min, minValue[x], mustSupport, ordered, orderMeaning, path, pattern[x], profile, representation, requirements, rules, severity, short, sliceName, slicing, source, strength, targetProfile, type, value[x], valueSet[x], versioning, xpath. For simple data types there will only be one repetition. For complex data types, multiple repetitions will be present defining a nested structure using the "path" element.
Control	1..*
Is Modifier	false
2. Extension.extension
Control	1..*
Slicing	This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `ElementDefinition` in FHIR R4B
Short	DataType slice for a FHIR STU3 `ElementDefinition` value
Control	1..1
6. Extension.extension:_datatype.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
8. Extension.extension:_datatype.value[x]
Comments	Must be: ElementDefinition
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Fixed Value	`ElementDefinition`
10. Extension.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.path`
Short	STU3: path
Comments	Element `ElementDefinition.path` is mapped to FHIR R4B element `ElementDefinition.path` as `Equivalent`.
Control	1..1
Requirements	Element `ElementDefinition.path` is mapped to FHIR R4B element `ElementDefinition.path` as `Equivalent`.
12. Extension.extension:path.url
Control	1..1
Fixed Value	`path`
14. Extension.extension:path.value[x]
Definition	The path identifies the element and is expressed as a "."-separated list of ancestor elements, beginning with the name of the resource or extension.
Short	Path of the element in the hierarchy of elements
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
16. Extension.extension:representation
Slice Name	representation
Definition	STU3: `ElementDefinition.representation`
Short	STU3: representation
Comments	Element `ElementDefinition.representation` is mapped to FHIR R4B element `ElementDefinition.representation` as `Equivalent`. In resources, this is rarely used except for special cases where the representation deviates from the normal, and can only be done in the base standard (and profiles must reproduce what the base standard does). This element is used quite commonly in Logical models when the logical models represent a specific serialization format (e.g. CDA, v2 etc).
Control	0..*
Requirements	Element `ElementDefinition.representation` is mapped to FHIR R4B element `ElementDefinition.representation` as `Equivalent`.
18. Extension.extension:representation.url
Control	1..1
Fixed Value	`representation`
20. Extension.extension:representation.value[x]
Definition	Codes that define how this element is represented in instances, when the deviation varies from the normal case.
Short	xmlAttr \| xmlText \| typeAttr \| cdaText \| xhtml
Comments	In resources, this is rarely used except for special cases where the representation deviates from the normal, and can only be done in the base standard (and profiles must reproduce what the base standard does). This element is used quite commonly in Logical models when the logical models represent a specific serialization format (e.g. CDA, v2 etc).
Control	0..1
Binding	The codes SHALL be taken from PropertyRepresentation (required to `http://hl7.org/fhir/ValueSet/property-representation\|4.3.0`) How a property is represented when serialized.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
22. Extension.extension:sliceName
Slice Name	sliceName
Definition	STU3: `ElementDefinition.sliceName`
Short	STU3: sliceName
Comments	Element `ElementDefinition.sliceName` is mapped to FHIR R4B element `ElementDefinition.sliceName` as `Equivalent`. The name SHALL be unique within the structure within the context of the constrained resource element. (Though to avoid confusion, uniqueness across all elements is recommended.).
Control	0..1
Requirements	May also be used for code generation purposes. Element `ElementDefinition.sliceName` is mapped to FHIR R4B element `ElementDefinition.sliceName` as `Equivalent`.
24. Extension.extension:sliceName.url
Control	1..1
Fixed Value	`sliceName`
26. Extension.extension:sliceName.value[x]
Definition	The name of this element definition slice, when slicing is working. The name must be a token with no dots or spaces. This is a unique name referring to a specific set of constraints applied to this element, used to provide a name to different slices of the same element.
Short	Name for this particular element (in a set of slices)
Comments	The name SHALL be unique within the structure within the context of the constrained resource element. (Though to avoid confusion, uniqueness across all elements is recommended.).
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
28. Extension.extension:label
Slice Name	label
Definition	STU3: `ElementDefinition.label`
Short	STU3: label
Comments	Element `ElementDefinition.label` is mapped to FHIR R4B element `ElementDefinition.label` as `Equivalent`. See also the extension (http://hl7.org/fhir/StructureDefinition/elementdefinition-question)[extension-elementdefinition-question.html].
Control	0..1
Requirements	Element `ElementDefinition.label` is mapped to FHIR R4B element `ElementDefinition.label` as `Equivalent`.
30. Extension.extension:label.url
Control	1..1
Fixed Value	`label`
32. Extension.extension:label.value[x]
Definition	A single preferred label which is the text to display beside the element indicating its meaning or to use to prompt for the element in a user display or form.
Short	Name for element to display with or prompt for element
Comments	See also the extension (http://hl7.org/fhir/StructureDefinition/elementdefinition-question)[extension-elementdefinition-question.html].
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
34. Extension.extension:code
Slice Name	code
Definition	STU3: `ElementDefinition.code`
Short	STU3: code
Comments	Element `ElementDefinition.code` is mapped to FHIR R4B element `ElementDefinition.code` as `Equivalent`. The concept SHALL be properly aligned with the data element definition and other constraints, as defined in the code system, including relationships, of any code listed here. Where multiple codes exist in a terminology that could correspond to the data element, the most granular code(s) should be selected, so long as they are not more restrictive than the data element itself. The mappings may be used to provide more or less granular or structured equivalences in the code system.
Control	0..*
Requirements	Links the meaning of an element to an external terminology, and is very useful for searching and indexing. Element `ElementDefinition.code` is mapped to FHIR R4B element `ElementDefinition.code` as `Equivalent`.
36. Extension.extension:code.url
Control	1..1
Fixed Value	`code`
38. Extension.extension:code.value[x]
Definition	A code that has the same meaning as the element in a particular terminology.
Short	Corresponding codes in terminologies
Comments	The concept SHALL be properly aligned with the data element definition and other constraints, as defined in the code system, including relationships, of any code listed here. Where multiple codes exist in a terminology that could correspond to the data element, the most granular code(s) should be selected, so long as they are not more restrictive than the data element itself. The mappings may be used to provide more or less granular or structured equivalences in the code system.
Control	0..1
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
40. Extension.extension:slicing
Slice Name	slicing
Definition	STU3: `ElementDefinition.slicing`
Short	STU3: slicing
Comments	Element `ElementDefinition.slicing` is mapped to FHIR R4B element `ElementDefinition.slicing` as `Equivalent`. The first element in the sequence, the one that carries the slicing, is the definition that applies to all the slices. This is based on the unconstrained element, but can apply any constraints as appropriate. This may include the common constraints on the children of the element.
Control	0..1
Requirements	Element `ElementDefinition.slicing` is mapped to FHIR R4B element `ElementDefinition.slicing` as `Equivalent`.
42. Extension.extension:slicing.extension
Control	1..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
44. Extension.extension:slicing.extension:discriminator
Slice Name	discriminator
Definition	STU3: `ElementDefinition.slicing.discriminator`
Short	STU3: discriminator
Comments	Element `ElementDefinition.slicing.discriminator` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator` as `Equivalent`. If there is no discriminator, the content is hard to process, so this should be avoided. If the base element has a cardinality of ..1, and there is a choice of types, the discriminator must be "@type".
Control	0..*
Requirements	Element `ElementDefinition.slicing.discriminator` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator` as `Equivalent`.
46. Extension.extension:slicing.extension:discriminator.extension
Control	2..*
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
48. Extension.extension:slicing.extension:discriminator.extension:type
Slice Name	type
Definition	STU3: `ElementDefinition.slicing.discriminator.type`
Short	STU3: type
Comments	Element `ElementDefinition.slicing.discriminator.type` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.type` as `Equivalent`.
Control	1..1
Requirements	Element `ElementDefinition.slicing.discriminator.type` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.type` as `Equivalent`.
50. Extension.extension:slicing.extension:discriminator.extension:type.url
Control	1..1
Fixed Value	`type`
52. Extension.extension:slicing.extension:discriminator.extension:type.value[x]
Definition	How the element value is interpreted when discrimination is evaluated.
Short	value \| exists \| pattern \| type \| profile
Control	1..1
Binding	The codes SHALL be taken from DiscriminatorType (required to `http://hl7.org/fhir/ValueSet/discriminator-type\|4.3.0`) How an element value is interpreted when discrimination is evaluated
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
54. Extension.extension:slicing.extension:discriminator.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.slicing.discriminator.path`
Short	STU3: path
Comments	Element `ElementDefinition.slicing.discriminator.path` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.path` as `Equivalent`. The only FHIRPath functions that are allowed are resolve(), and extension(url).
Control	1..1
Requirements	Element `ElementDefinition.slicing.discriminator.path` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.path` as `Equivalent`.
56. Extension.extension:slicing.extension:discriminator.extension:path.url
Control	1..1
Fixed Value	`path`
58. Extension.extension:slicing.extension:discriminator.extension:path.value[x]
Definition	A FHIRPath expression, using a restricted subset of FHIRPath, that is used to identify the element on which discrimination is based.
Short	Path to element value
Comments	The only FHIRPath functions that are allowed are resolve(), and extension(url).
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
60. Extension.extension:slicing.extension:discriminator.url
Control	1..1
Fixed Value	`discriminator`
62. Extension.extension:slicing.extension:discriminator.value[x]
Control	0..0
64. Extension.extension:slicing.extension:description
Slice Name	description
Definition	STU3: `ElementDefinition.slicing.description`
Short	STU3: description
Comments	Element `ElementDefinition.slicing.description` is mapped to FHIR R4B element `ElementDefinition.slicing.description` as `Equivalent`. If it's really not possible to differentiate them, the design should be re-evaluated to make the content usable.
Control	0..1
Requirements	Element `ElementDefinition.slicing.description` is mapped to FHIR R4B element `ElementDefinition.slicing.description` as `Equivalent`.
66. Extension.extension:slicing.extension:description.url
Control	1..1
Fixed Value	`description`
68. Extension.extension:slicing.extension:description.value[x]
Definition	A human-readable text description of how the slicing works. If there is no discriminator, this is required to be present to provide whatever information is possible about how the slices can be differentiated.
Short	Text description of how slicing works (or not)
Comments	If it's really not possible to differentiate them, the design should be re-evaluated to make the content usable.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
70. Extension.extension:slicing.extension:ordered
Slice Name	ordered
Definition	STU3: `ElementDefinition.slicing.ordered`
Short	STU3: ordered
Comments	Element `ElementDefinition.slicing.ordered` is mapped to FHIR R4B element `ElementDefinition.slicing.ordered` as `Equivalent`. Order should only be required when it is a pressing concern for presentation. Profile authors should consider making the order a feature of the rules about the narrative, not the rules about the data - requiring ordered data makes the profile much less re-usable.
Control	0..1
Requirements	Element `ElementDefinition.slicing.ordered` is mapped to FHIR R4B element `ElementDefinition.slicing.ordered` as `Equivalent`.
72. Extension.extension:slicing.extension:ordered.url
Control	1..1
Fixed Value	`ordered`
74. Extension.extension:slicing.extension:ordered.value[x]
Definition	If the matching elements have to occur in the same order as defined in the profile.
Short	If elements must be in same order as slices
Comments	Order should only be required when it is a pressing concern for presentation. Profile authors should consider making the order a feature of the rules about the narrative, not the rules about the data - requiring ordered data makes the profile much less re-usable.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
76. Extension.extension:slicing.extension:rules
Slice Name	rules
Definition	STU3: `ElementDefinition.slicing.rules`
Short	STU3: rules
Comments	Element `ElementDefinition.slicing.rules` is mapped to FHIR R4B element `ElementDefinition.slicing.rules` as `Equivalent`. Allowing additional elements makes for a much for flexible template - it's open for use in wider contexts, but also means that the content of the resource is not closed, and applications have to decide how to handle content not described by the profile.
Control	1..1
Requirements	Element `ElementDefinition.slicing.rules` is mapped to FHIR R4B element `ElementDefinition.slicing.rules` as `Equivalent`.
78. Extension.extension:slicing.extension:rules.url
Control	1..1
Fixed Value	`rules`
80. Extension.extension:slicing.extension:rules.value[x]
Definition	Whether additional slices are allowed or not. When the slices are ordered, profile authors can also say that additional slices are only allowed at the end.
Short	closed \| open \| openAtEnd
Comments	Allowing additional elements makes for a much for flexible template - it's open for use in wider contexts, but also means that the content of the resource is not closed, and applications have to decide how to handle content not described by the profile.
Control	1..1
Binding	The codes SHALL be taken from SlicingRules (required to `http://hl7.org/fhir/ValueSet/resource-slicing-rules\|4.3.0`) How slices are interpreted when evaluating an instance.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
82. Extension.extension:slicing.url
Control	1..1
Fixed Value	`slicing`
84. Extension.extension:slicing.value[x]
Control	0..0
86. Extension.extension:short
Slice Name	short
Definition	STU3: `ElementDefinition.short`
Short	STU3: short
Comments	Element `ElementDefinition.short` is mapped to FHIR R4B element `ElementDefinition.short` as `Equivalent`. May change the term to provide language more appropriate to the context of the profile or to reflect slicing.
Control	0..1
Requirements	Element `ElementDefinition.short` is mapped to FHIR R4B element `ElementDefinition.short` as `Equivalent`.
88. Extension.extension:short.url
Control	1..1
Fixed Value	`short`
90. Extension.extension:short.value[x]
Definition	A concise description of what this element means (e.g. for use in autogenerated summaries).
Short	Concise definition for space-constrained presentation
Comments	May change the term to provide language more appropriate to the context of the profile or to reflect slicing.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
92. Extension.extension:definition
Slice Name	definition
Definition	STU3: `ElementDefinition.definition`
Short	STU3: definition
Comments	Element `ElementDefinition.definition` is mapped to FHIR R4B element `ElementDefinition.definition` as `Equivalent`. It is easy for a different definition to change the meaning of an element and this can have nasty downstream consequences. Please be careful when providing definitions.
Control	0..1
Requirements	To allow a user to state the usage of an element in a particular context. Element `ElementDefinition.definition` is mapped to FHIR R4B element `ElementDefinition.definition` as `Equivalent`.
94. Extension.extension:definition.url
Control	1..1
Fixed Value	`definition`
96. Extension.extension:definition.value[x]
Definition	Provides a complete explanation of the meaning of the data element for human readability. For the case of elements derived from existing elements (e.g. constraints), the definition SHALL be consistent with the base definition, but convey the meaning of the element in the particular context of use of the resource.
Short	Full formal definition as narrative text
Comments	It is easy for a different definition to change the meaning of an element and this can have nasty downstream consequences. Please be careful when providing definitions.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
98. Extension.extension:comment
Slice Name	comment
Definition	STU3: `ElementDefinition.comment`
Short	STU3: comment
Comments	Element `ElementDefinition.comment` is mapped to FHIR R4B element `ElementDefinition.comment` as `Equivalent`. If it is possible to capture usage rules using constraints, that mechanism should be used in preference to this element.
Control	0..1
Requirements	Element `ElementDefinition.comment` is mapped to FHIR R4B element `ElementDefinition.comment` as `Equivalent`.
100. Extension.extension:comment.url
Control	1..1
Fixed Value	`comment`
102. Extension.extension:comment.value[x]
Definition	Explanatory notes and implementation guidance about the data element, including notes about how to use the data properly, exceptions to proper use, etc.
Short	Comments about the use of this element
Comments	If it is possible to capture usage rules using constraints, that mechanism should be used in preference to this element.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
104. Extension.extension:requirements
Slice Name	requirements
Definition	STU3: `ElementDefinition.requirements`
Short	STU3: requirements
Comments	Element `ElementDefinition.requirements` is mapped to FHIR R4B element `ElementDefinition.requirements` as `Equivalent`. This element does not describe the usage of the element (that's done in comments), rather it's for traceability of why the element is either needed or why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this data element.
Control	0..1
Requirements	Element `ElementDefinition.requirements` is mapped to FHIR R4B element `ElementDefinition.requirements` as `Equivalent`.
106. Extension.extension:requirements.url
Control	1..1
Fixed Value	`requirements`
108. Extension.extension:requirements.value[x]
Definition	This element is for traceability of why the element was created and why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this element.
Short	Why this resource has been created
Comments	This element does not describe the usage of the element (that's done in comments), rather it's for traceability of why the element is either needed or why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this data element.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
110. Extension.extension:alias
Slice Name	alias
Definition	STU3: `ElementDefinition.alias`
Short	STU3: alias
Comments	Element `ElementDefinition.alias` is mapped to FHIR R4B element `ElementDefinition.alias` as `Equivalent`.
Control	0..*
Requirements	Allows for better easier recognition of the element by multiple communities, including international communities. Element `ElementDefinition.alias` is mapped to FHIR R4B element `ElementDefinition.alias` as `Equivalent`.
112. Extension.extension:alias.url
Control	1..1
Fixed Value	`alias`
114. Extension.extension:alias.value[x]
Definition	Identifies additional names by which this element might also be known.
Short	Other names
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
116. Extension.extension:min
Slice Name	min
Definition	STU3: `ElementDefinition.min`
Short	STU3: min
Comments	Element `ElementDefinition.min` is mapped to FHIR R4B element `ElementDefinition.min` as `Equivalent`.
Control	0..1
Requirements	Element `ElementDefinition.min` is mapped to FHIR R4B element `ElementDefinition.min` as `Equivalent`.
118. Extension.extension:min.url
Control	1..1
Fixed Value	`min`
120. Extension.extension:min.value[x]
Definition	The minimum number of times this element SHALL appear in the instance.
Short	Minimum Cardinality
Control	0..1
Type	unsignedInt
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
122. Extension.extension:max
Slice Name	max
Definition	STU3: `ElementDefinition.max`
Short	STU3: max
Comments	Element `ElementDefinition.max` is mapped to FHIR R4B element `ElementDefinition.max` as `Equivalent`.
Control	0..1
Requirements	Element `ElementDefinition.max` is mapped to FHIR R4B element `ElementDefinition.max` as `Equivalent`.
124. Extension.extension:max.url
Control	1..1
Fixed Value	`max`
126. Extension.extension:max.value[x]
Definition	The maximum number of times this element is permitted to appear in the instance.
Short	Maximum Cardinality (a number or *)
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
128. Extension.extension:base
Slice Name	base
Definition	STU3: `ElementDefinition.base`
Short	STU3: base
Comments	Element `ElementDefinition.base` is mapped to FHIR R4B element `ElementDefinition.base` as `Equivalent`. The base information does not carry any information that could not be determined from the path and related profiles, but making this determination requires both that the related profiles are available, and that the algorithm to determine them be available. So they are deformalised into this location for tooling convenience, and to ensure that the base information is available without dependencies.
Control	0..1
Requirements	Element `ElementDefinition.base` is mapped to FHIR R4B element `ElementDefinition.base` as `Equivalent`.
130. Extension.extension:base.extension
Control	3..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
132. Extension.extension:base.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.base.path`
Short	STU3: path
Comments	Element `ElementDefinition.base.path` is mapped to FHIR R4B element `ElementDefinition.base.path` as `Equivalent`.
Control	1..1
Requirements	Element `ElementDefinition.base.path` is mapped to FHIR R4B element `ElementDefinition.base.path` as `Equivalent`.
134. Extension.extension:base.extension:path.url
Control	1..1
Fixed Value	`path`
136. Extension.extension:base.extension:path.value[x]
Definition	The Path that identifies the base element - this matches the ElementDefinition.path for that element. Across FHIR, there is only one base definition of any element - that is, an element definition on a StructureDefinition without a StructureDefinition.base.
Short	Path that identifies the base element
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
138. Extension.extension:base.extension:min
Slice Name	min
Definition	STU3: `ElementDefinition.base.min`
Short	STU3: min
Comments	Element `ElementDefinition.base.min` is mapped to FHIR R4B element `ElementDefinition.base.min` as `Equivalent`. This is provided for consistency with max, and may affect code generation of mandatory elements of the base resource are generated differently (some reference implementations have done this).
Control	1..1
Requirements	Element `ElementDefinition.base.min` is mapped to FHIR R4B element `ElementDefinition.base.min` as `Equivalent`.
140. Extension.extension:base.extension:min.url
Control	1..1
Fixed Value	`min`
142. Extension.extension:base.extension:min.value[x]
Definition	Minimum cardinality of the base element identified by the path.
Short	Min cardinality of the base element
Comments	This is provided for consistency with max, and may affect code generation of mandatory elements of the base resource are generated differently (some reference implementations have done this).
Control	1..1
Type	unsignedInt
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
144. Extension.extension:base.extension:max
Slice Name	max
Definition	STU3: `ElementDefinition.base.max`
Short	STU3: max
Comments	Element `ElementDefinition.base.max` is mapped to FHIR R4B element `ElementDefinition.base.max` as `Equivalent`. This is provided to code generation, since the serialization representation in JSON differs depending on whether the base element has max > 1. Also, some forms of code generation may differ.
Control	1..1
Requirements	Element `ElementDefinition.base.max` is mapped to FHIR R4B element `ElementDefinition.base.max` as `Equivalent`.
146. Extension.extension:base.extension:max.url
Control	1..1
Fixed Value	`max`
148. Extension.extension:base.extension:max.value[x]
Definition	Maximum cardinality of the base element identified by the path.
Short	Max cardinality of the base element
Comments	This is provided to code generation, since the serialization representation in JSON differs depending on whether the base element has max > 1. Also, some forms of code generation may differ.
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
150. Extension.extension:base.url
Control	1..1
Fixed Value	`base`
152. Extension.extension:base.value[x]
Control	0..0
154. Extension.extension:contentReference
Slice Name	contentReference
Definition	STU3: `ElementDefinition.contentReference`
Short	STU3: contentReference
Comments	Element `ElementDefinition.contentReference` is mapped to FHIR R4B element `ElementDefinition.contentReference` as `Equivalent`.
Control	0..1
Requirements	Element `ElementDefinition.contentReference` is mapped to FHIR R4B element `ElementDefinition.contentReference` as `Equivalent`.
156. Extension.extension:contentReference.url
Control	1..1
Fixed Value	`contentReference`
158. Extension.extension:contentReference.value[x]
Definition	Identifies the identity of an element defined elsewhere in the profile whose content rules should be applied to the current element.
Short	Reference to definition of content for the element
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
160. Extension.extension:type
Slice Name	type
Definition	STU3: `ElementDefinition.type`
Short	STU3: type
Comments	Element `ElementDefinition.type` is mapped to FHIR R4B element `ElementDefinition.type` as `Equivalent`. The Type of the element can be left blank in a differential constraint, in which case the type is inherited from the resource. Abstract types are not permitted to appear as a type when multiple types are listed. (I.e. Abstract types cannot be part of a choice).
Control	0..*
Requirements	Element `ElementDefinition.type` is mapped to FHIR R4B element `ElementDefinition.type` as `Equivalent`.
162. Extension.extension:type.extension
Control	1..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
164. Extension.extension:type.extension:code
Slice Name	code
Definition	STU3: `ElementDefinition.type.code`
Short	STU3: code
Comments	Element `ElementDefinition.type.code` is mapped to FHIR R4B element `ElementDefinition.type.code` as `Equivalent`. If the element is a reference to another resource, this element contains "Reference", and the targetProfile element defines what resources can be referenced. The targetProfile may be a reference to the general definition of a resource (e.g. http://hl7.org/fhir/StructureDefinition/Patient). There would be one pair of type/code for each allowed target resource type.
Control	1..1
Requirements	Element `ElementDefinition.type.code` is mapped to FHIR R4B element `ElementDefinition.type.code` as `Equivalent`.
166. Extension.extension:type.extension:code.url
Control	1..1
Fixed Value	`code`
168. Extension.extension:type.extension:code.value[x]
Definition	URL of Data type or Resource that is a(or the) type used for this element. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition e.g. "string" is a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute URLs are only allowed in logical models.
Short	Data type or Resource (reference to definition)
Comments	If the element is a reference to another resource, this element contains "Reference", and the targetProfile element defines what resources can be referenced. The targetProfile may be a reference to the general definition of a resource (e.g. http://hl7.org/fhir/StructureDefinition/Patient). There would be one pair of type/code for each allowed target resource type.
Control	1..1
Binding	Unless not suitable, these codes SHALL be taken from R3DefinedTypesForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-defined-types-for-R4B\|0.1.0`) Either a resource or a data type, including logical model types
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
170. Extension.extension:type.extension:profile
Slice Name	profile
Definition	STU3: `ElementDefinition.type.profile`
Short	STU3: Profile (StructureDefinition) to apply (or IG)
Comments	Element `ElementDefinition.type.profile` is mapped to FHIR R4B element `ElementDefinition.type.profile` as `SourceIsNarrowerThanTarget`.
Control	0..1
Requirements	Element `ElementDefinition.type.profile` is mapped to FHIR R4B element `ElementDefinition.type.profile` as `SourceIsNarrowerThanTarget`.
172. Extension.extension:type.extension:profile.url
Control	1..1
Fixed Value	`profile`
174. Extension.extension:type.extension:profile.value[x]
Definition	Identifies a profile structure or implementation Guide that SHALL hold for the datatype this element refers to. Can be a local reference - to a contained StructureDefinition, or a reference to another StructureDefinition or Implementation Guide by a canonical URL. When an implementation guide is specified, the resource SHALL conform to at least one profile defined in the implementation guide.
Short	Profile (StructureDefinition) to apply (or IG)
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
176. Extension.extension:type.extension:targetProfile
Slice Name	targetProfile
Definition	STU3: `ElementDefinition.type.targetProfile`
Short	STU3: Profile (StructureDefinition) to apply to reference target (or IG)
Comments	Element `ElementDefinition.type.targetProfile` is mapped to FHIR R4B element `ElementDefinition.type.targetProfile` as `SourceIsNarrowerThanTarget`.
Control	0..1
Requirements	Element `ElementDefinition.type.targetProfile` is mapped to FHIR R4B element `ElementDefinition.type.targetProfile` as `SourceIsNarrowerThanTarget`.
178. Extension.extension:type.extension:targetProfile.url
Control	1..1
Fixed Value	`targetProfile`
180. Extension.extension:type.extension:targetProfile.value[x]
Definition	Identifies a profile structure or implementation Guide that SHALL hold for the target of the reference this element refers to. Can be a local reference - to a contained StructureDefinition, or a reference to another StructureDefinition or Implementation Guide by a canonical URL. When an implementation guide is specified, the resource SHALL conform to at least one profile defined in the implementation guide.
Short	Profile (StructureDefinition) to apply to reference target (or IG)
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
182. Extension.extension:type.extension:aggregation
Slice Name	aggregation
Definition	STU3: `ElementDefinition.type.aggregation`
Short	STU3: aggregation
Comments	Element `ElementDefinition.type.aggregation` is mapped to FHIR R4B element `ElementDefinition.type.aggregation` as `Equivalent`.
Control	0..*
Requirements	Element `ElementDefinition.type.aggregation` is mapped to FHIR R4B element `ElementDefinition.type.aggregation` as `Equivalent`.
184. Extension.extension:type.extension:aggregation.url
Control	1..1
Fixed Value	`aggregation`
186. Extension.extension:type.extension:aggregation.value[x]
Definition	If the type is a reference to another resource, how the resource is or can be aggregated - is it a contained resource, or a reference, and if the context is a bundle, is it included in the bundle.
Short	contained \| referenced \| bundled - how aggregated
Control	0..1
Binding	The codes SHALL be taken from AggregationMode (required to `http://hl7.org/fhir/ValueSet/resource-aggregation-mode\|4.3.0`) How resource references can be aggregated.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
188. Extension.extension:type.extension:versioning
Slice Name	versioning
Definition	STU3: `ElementDefinition.type.versioning`
Short	STU3: versioning
Comments	Element `ElementDefinition.type.versioning` is mapped to FHIR R4B element `ElementDefinition.type.versioning` as `Equivalent`. The base specification never makes a rule as to which form is allowed, but implementation guides may do this.
Control	0..1
Requirements	Element `ElementDefinition.type.versioning` is mapped to FHIR R4B element `ElementDefinition.type.versioning` as `Equivalent`.
190. Extension.extension:type.extension:versioning.url
Control	1..1
Fixed Value	`versioning`
192. Extension.extension:type.extension:versioning.value[x]
Definition	Whether this reference needs to be version specific or version independent, or whether either can be used.
Short	either \| independent \| specific
Comments	The base specification never makes a rule as to which form is allowed, but implementation guides may do this.
Control	0..1
Binding	The codes SHALL be taken from ReferenceVersionRules (required to `http://hl7.org/fhir/ValueSet/reference-version-rules\|4.3.0`) Whether a reference needs to be version specific or version independent, or whether either can be used
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
194. Extension.extension:type.url
Control	1..1
Fixed Value	`type`
196. Extension.extension:type.value[x]
Control	0..0
198. Extension.extension:defaultValue
Slice Name	defaultValue
Definition	STU3: `ElementDefinition.defaultValue[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: defaultValue additional types
Comments	Element `ElementDefinition.defaultValue[x]` is mapped to FHIR R4B element `ElementDefinition.defaultValue[x]` as `RelatedTo`. The mappings for `ElementDefinition.defaultValue[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.defaultValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Default values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. Specifying a default value means that the property can never been unknown - it must always have a value. Further, the default value can never be changed. For these reasons, default values are (and should be) used extremely sparingly.
Control	0..1
Requirements	Element `ElementDefinition.defaultValue[x]` is mapped to FHIR R4B element `ElementDefinition.defaultValue[x]` as `RelatedTo`. The mappings for `ElementDefinition.defaultValue[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.defaultValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
200. Extension.extension:defaultValue.extension
Control	0..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
202. Extension.extension:defaultValue.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
204. Extension.extension:defaultValue.extension:_datatype.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
206. Extension.extension:defaultValue.extension:_datatype.value[x]
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Fixed Value	`Meta`
208. Extension.extension:defaultValue.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
210. Extension.extension:defaultValue.extension:versionId.url
Control	1..1
Fixed Value	`versionId`
212. Extension.extension:defaultValue.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
214. Extension.extension:defaultValue.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
216. Extension.extension:defaultValue.extension:lastUpdated.url
Control	1..1
Fixed Value	`lastUpdated`
218. Extension.extension:defaultValue.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
220. Extension.extension:defaultValue.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
222. Extension.extension:defaultValue.extension:profile.url
Control	1..1
Fixed Value	`profile`
224. Extension.extension:defaultValue.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
226. Extension.extension:defaultValue.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
228. Extension.extension:defaultValue.extension:security.url
Control	1..1
Fixed Value	`security`
230. Extension.extension:defaultValue.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
232. Extension.extension:defaultValue.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
234. Extension.extension:defaultValue.extension:tag.url
Control	1..1
Fixed Value	`tag`
236. Extension.extension:defaultValue.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
238. Extension.extension:defaultValue.url
Control	1..1
Fixed Value	`defaultValue`
240. Extension.extension:defaultValue.value[x]
Definition	The value that should be used if there is no value stated in the instance (e.g. 'if not otherwise specified, the abstract is false').
Short	Specified value if missing from instance
Comments	Default values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. Specifying a default value means that the property can never been unknown - it must always have a value. Further, the default value can never be changed. For these reasons, default values are (and should be) used extremely sparingly.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
242. Extension.extension:meaningWhenMissing
Slice Name	meaningWhenMissing
Definition	STU3: `ElementDefinition.meaningWhenMissing`
Short	STU3: meaningWhenMissing
Comments	Element `ElementDefinition.meaningWhenMissing` is mapped to FHIR R4B element `ElementDefinition.meaningWhenMissing` as `Equivalent`. Implicit meanings for missing values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. An implicit meaning for a missing value can never be changed, and specifying one has the consequence that constraining its use in profiles eliminates use cases as possibilities, not merely moving them out of scope.
Control	0..1
Requirements	Element `ElementDefinition.meaningWhenMissing` is mapped to FHIR R4B element `ElementDefinition.meaningWhenMissing` as `Equivalent`.
244. Extension.extension:meaningWhenMissing.url
Control	1..1
Fixed Value	`meaningWhenMissing`
246. Extension.extension:meaningWhenMissing.value[x]
Definition	The Implicit meaning that is to be understood when this element is missing (e.g. 'when this element is missing, the period is ongoing'.
Short	Implicit meaning when this element is missing
Comments	Implicit meanings for missing values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. An implicit meaning for a missing value can never be changed, and specifying one has the consequence that constraining its use in profiles eliminates use cases as possibilities, not merely moving them out of scope.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
248. Extension.extension:orderMeaning
Slice Name	orderMeaning
Definition	STU3: `ElementDefinition.orderMeaning`
Short	STU3: orderMeaning
Comments	Element `ElementDefinition.orderMeaning` is mapped to FHIR R4B element `ElementDefinition.orderMeaning` as `Equivalent`. This element can only be asserted on repeating elements and can only be introduced when defining resources or data types. It can be further refined profiled elements but if absent in the base type, a profile cannot assert meaning.
Control	0..1
Requirements	Element `ElementDefinition.orderMeaning` is mapped to FHIR R4B element `ElementDefinition.orderMeaning` as `Equivalent`.
250. Extension.extension:orderMeaning.url
Control	1..1
Fixed Value	`orderMeaning`
252. Extension.extension:orderMeaning.value[x]
Definition	If present, indicates that the order of the repeating element has meaning and describes what that meaning is. If absent, it means that the order of the element has no meaning.
Short	What the order of the elements means
Comments	This element can only be asserted on repeating elements and can only be introduced when defining resources or data types. It can be further refined profiled elements but if absent in the base type, a profile cannot assert meaning.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
254. Extension.extension:fixed
Slice Name	fixed
Definition	STU3: `ElementDefinition.fixed[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: fixed additional types
Comments	Element `ElementDefinition.fixed[x]` is mapped to FHIR R4B element `ElementDefinition.fixed[x]` as `RelatedTo`. The mappings for `ElementDefinition.fixed[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.fixed[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. This is not recommended for Coding and CodeableConcept since these often have highly contextual properties such as version or display.
Control	0..1
Requirements	Element `ElementDefinition.fixed[x]` is mapped to FHIR R4B element `ElementDefinition.fixed[x]` as `RelatedTo`. The mappings for `ElementDefinition.fixed[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.fixed[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
256. Extension.extension:fixed.extension
Control	0..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
258. Extension.extension:fixed.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
260. Extension.extension:fixed.extension:_datatype.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
262. Extension.extension:fixed.extension:_datatype.value[x]
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Fixed Value	`Meta`
264. Extension.extension:fixed.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
266. Extension.extension:fixed.extension:versionId.url
Control	1..1
Fixed Value	`versionId`
268. Extension.extension:fixed.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
270. Extension.extension:fixed.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
272. Extension.extension:fixed.extension:lastUpdated.url
Control	1..1
Fixed Value	`lastUpdated`
274. Extension.extension:fixed.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
276. Extension.extension:fixed.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
278. Extension.extension:fixed.extension:profile.url
Control	1..1
Fixed Value	`profile`
280. Extension.extension:fixed.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
282. Extension.extension:fixed.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
284. Extension.extension:fixed.extension:security.url
Control	1..1
Fixed Value	`security`
286. Extension.extension:fixed.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
288. Extension.extension:fixed.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
290. Extension.extension:fixed.extension:tag.url
Control	1..1
Fixed Value	`tag`
292. Extension.extension:fixed.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
294. Extension.extension:fixed.url
Control	1..1
Fixed Value	`fixed`
296. Extension.extension:fixed.value[x]
Definition	Specifies a value that SHALL be exactly the value for this element in the instance. For purposes of comparison, non-significant whitespace is ignored, and all values must be an exact match (case and accent sensitive). Missing elements/attributes must also be missing.
Short	Value must be exactly this
Comments	This is not recommended for Coding and CodeableConcept since these often have highly contextual properties such as version or display.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
298. Extension.extension:pattern
Slice Name	pattern
Definition	STU3: `ElementDefinition.pattern[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: pattern additional types
Comments	Element `ElementDefinition.pattern[x]` is mapped to FHIR R4B element `ElementDefinition.pattern[x]` as `RelatedTo`. The mappings for `ElementDefinition.pattern[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.pattern[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Mostly used for fixing values of CodeableConcept. At present, pattern[x] is not recommended as a basis for slicing while issues related to this are investigated during the STU period.
Control	0..1
Requirements	Element `ElementDefinition.pattern[x]` is mapped to FHIR R4B element `ElementDefinition.pattern[x]` as `RelatedTo`. The mappings for `ElementDefinition.pattern[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.pattern[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
300. Extension.extension:pattern.extension
Control	0..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
302. Extension.extension:pattern.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
304. Extension.extension:pattern.extension:_datatype.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
306. Extension.extension:pattern.extension:_datatype.value[x]
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Fixed Value	`Meta`
308. Extension.extension:pattern.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
310. Extension.extension:pattern.extension:versionId.url
Control	1..1
Fixed Value	`versionId`
312. Extension.extension:pattern.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
314. Extension.extension:pattern.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
316. Extension.extension:pattern.extension:lastUpdated.url
Control	1..1
Fixed Value	`lastUpdated`
318. Extension.extension:pattern.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
320. Extension.extension:pattern.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
322. Extension.extension:pattern.extension:profile.url
Control	1..1
Fixed Value	`profile`
324. Extension.extension:pattern.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
326. Extension.extension:pattern.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
328. Extension.extension:pattern.extension:security.url
Control	1..1
Fixed Value	`security`
330. Extension.extension:pattern.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
332. Extension.extension:pattern.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
334. Extension.extension:pattern.extension:tag.url
Control	1..1
Fixed Value	`tag`
336. Extension.extension:pattern.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
338. Extension.extension:pattern.url
Control	1..1
Fixed Value	`pattern`
340. Extension.extension:pattern.value[x]
Definition	Specifies a value that the value in the instance SHALL follow - that is, any value in the pattern must be found in the instance. Other additional values may be found too. This is effectively constraint by example. The values of elements present in the pattern must match exactly (case-sensitive, accent-sensitive, etc.).
Short	Value must have at least these property values
Comments	Mostly used for fixing values of CodeableConcept. At present, pattern[x] is not recommended as a basis for slicing while issues related to this are investigated during the STU period.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
342. Extension.extension:example
Slice Name	example
Definition	STU3: `ElementDefinition.example`
Short	STU3: example
Comments	Element `ElementDefinition.example` is mapped to FHIR R4B element `ElementDefinition.example` as `Equivalent`. Examples will most commonly be present for data where it's not implicitly obvious from either the data type or value set what the values might be. (I.e. Example values for dates or quantities would generally be unnecessary.) If the example value is fully populated, the publication tool can generate an instance automatically.
Control	0..*
Requirements	Element `ElementDefinition.example` is mapped to FHIR R4B element `ElementDefinition.example` as `Equivalent`.
344. Extension.extension:example.extension
Control	2..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
346. Extension.extension:example.extension:label
Slice Name	label
Definition	STU3: `ElementDefinition.example.label`
Short	STU3: label
Comments	Element `ElementDefinition.example.label` is mapped to FHIR R4B element `ElementDefinition.example.label` as `Equivalent`.
Control	1..1
Requirements	Element `ElementDefinition.example.label` is mapped to FHIR R4B element `ElementDefinition.example.label` as `Equivalent`.
348. Extension.extension:example.extension:label.url
Control	1..1
Fixed Value	`label`
350. Extension.extension:example.extension:label.value[x]
Definition	Describes the purpose of this example amoung the set of examples.
Short	Describes the purpose of this example
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
352. Extension.extension:example.extension:value
Slice Name	value
Definition	STU3: `ElementDefinition.example.value[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: value additional types
Comments	Element `ElementDefinition.example.value[x]` is mapped to FHIR R4B element `ElementDefinition.example.value[x]` as `RelatedTo`. The mappings for `ElementDefinition.example.value[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.example.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition.example`.
Control	1..1
Requirements	Element `ElementDefinition.example.value[x]` is mapped to FHIR R4B element `ElementDefinition.example.value[x]` as `RelatedTo`. The mappings for `ElementDefinition.example.value[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.example.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition.example`.
354. Extension.extension:example.extension:value.extension
Control	1..*
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
356. Extension.extension:example.extension:value.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
358. Extension.extension:example.extension:value.extension:_datatype.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
360. Extension.extension:example.extension:value.extension:_datatype.value[x]
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Fixed Value	`Meta`
362. Extension.extension:example.extension:value.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
364. Extension.extension:example.extension:value.extension:versionId.url
Control	1..1
Fixed Value	`versionId`
366. Extension.extension:example.extension:value.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
368. Extension.extension:example.extension:value.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
370. Extension.extension:example.extension:value.extension:lastUpdated.url
Control	1..1
Fixed Value	`lastUpdated`
372. Extension.extension:example.extension:value.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
374. Extension.extension:example.extension:value.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
376. Extension.extension:example.extension:value.extension:profile.url
Control	1..1
Fixed Value	`profile`
378. Extension.extension:example.extension:value.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
380. Extension.extension:example.extension:value.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
382. Extension.extension:example.extension:value.extension:security.url
Control	1..1
Fixed Value	`security`
384. Extension.extension:example.extension:value.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
386. Extension.extension:example.extension:value.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
388. Extension.extension:example.extension:value.extension:tag.url
Control	1..1
Fixed Value	`tag`
390. Extension.extension:example.extension:value.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
392. Extension.extension:example.extension:value.url
Control	1..1
Fixed Value	`value`
394. Extension.extension:example.extension:value.value[x]
Definition	The actual value for the element, which must be one of the types allowed for this element.
Short	Value of Example (one of allowed types)
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
396. Extension.extension:example.url
Control	1..1
Fixed Value	`example`
398. Extension.extension:example.value[x]
Control	0..0
400. Extension.extension:minValue
Slice Name	minValue
Definition	STU3: `ElementDefinition.minValue[x]`
Short	STU3: minValue
Comments	Element `ElementDefinition.minValue[x]` is mapped to FHIR R4B element `ElementDefinition.minValue[x]` as `RelatedTo`. The target context `ElementDefinition.minValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Except for date/date/instant, the type of the minValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of minValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is subtracted from the current clock to determine the minimum allowable value. A minimum value for a Quantity is interpreted as an canonical minimum - e.g. you cannot provide 100mg if the minimum value is 10g.
Control	0..1
Requirements	Element `ElementDefinition.minValue[x]` is mapped to FHIR R4B element `ElementDefinition.minValue[x]` as `RelatedTo`. The target context `ElementDefinition.minValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
402. Extension.extension:minValue.url
Control	1..1
Fixed Value	`minValue`
404. Extension.extension:minValue.value[x]
Definition	The minimum allowed value for the element. The value is inclusive. This is allowed for the types date, dateTime, instant, time, decimal, integer, and Quantity.
Short	Minimum Allowed Value (for some types)
Comments	Except for date/date/instant, the type of the minValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of minValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is subtracted from the current clock to determine the minimum allowable value. A minimum value for a Quantity is interpreted as an canonical minimum - e.g. you cannot provide 100mg if the minimum value is 10g.
Control	0..1
Type	Choice of: date, dateTime, instant, time, decimal, integer, positiveInt, unsignedInt, Quantity
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
406. Extension.extension:maxValue
Slice Name	maxValue
Definition	STU3: `ElementDefinition.maxValue[x]`
Short	STU3: maxValue
Comments	Element `ElementDefinition.maxValue[x]` is mapped to FHIR R4B element `ElementDefinition.maxValue[x]` as `RelatedTo`. The target context `ElementDefinition.maxValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Except for date/date/instant, the type of the maxValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of maxValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is added to the current clock to determine the maximum allowable value. A maximum value for a Quantity is interpreted as an canonical maximum - e.g. you cannot provide 10g if the maximum value is 50mg.
Control	0..1
Requirements	Element `ElementDefinition.maxValue[x]` is mapped to FHIR R4B element `ElementDefinition.maxValue[x]` as `RelatedTo`. The target context `ElementDefinition.maxValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
408. Extension.extension:maxValue.url
Control	1..1
Fixed Value	`maxValue`
410. Extension.extension:maxValue.value[x]
Definition	The maximum allowed value for the element. The value is inclusive. This is allowed for the types date, dateTime, instant, time, decimal, integer, and Quantity.
Short	Maximum Allowed Value (for some types)
Comments	Except for date/date/instant, the type of the maxValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of maxValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is added to the current clock to determine the maximum allowable value. A maximum value for a Quantity is interpreted as an canonical maximum - e.g. you cannot provide 10g if the maximum value is 50mg.
Control	0..1
Type	Choice of: date, dateTime, instant, time, decimal, integer, positiveInt, unsignedInt, Quantity
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
412. Extension.extension:maxLength
Slice Name	maxLength
Definition	STU3: `ElementDefinition.maxLength`
Short	STU3: maxLength
Comments	Element `ElementDefinition.maxLength` is mapped to FHIR R4B element `ElementDefinition.maxLength` as `Equivalent`. Receivers are not required to reject instances that exceed the maximum length. The full length could be stored. In some cases, data might be truncated, though truncation should be undertaken with care and an understanding of the consequences of doing so. If not specified, there is no conformance expectation for length support.
Control	0..1
Requirements	Element `ElementDefinition.maxLength` is mapped to FHIR R4B element `ElementDefinition.maxLength` as `Equivalent`.
414. Extension.extension:maxLength.url
Control	1..1
Fixed Value	`maxLength`
416. Extension.extension:maxLength.value[x]
Definition	Indicates the maximum length in characters that is permitted to be present in conformant instances and which is expected to be supported by conformant consumers that support the element.
Short	Max length for strings
Comments	Receivers are not required to reject instances that exceed the maximum length. The full length could be stored. In some cases, data might be truncated, though truncation should be undertaken with care and an understanding of the consequences of doing so. If not specified, there is no conformance expectation for length support.
Control	0..1
Type	integer
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
418. Extension.extension:condition
Slice Name	condition
Definition	STU3: `ElementDefinition.condition`
Short	STU3: condition
Comments	Element `ElementDefinition.condition` is mapped to FHIR R4B element `ElementDefinition.condition` as `Equivalent`.
Control	0..*
Requirements	Element `ElementDefinition.condition` is mapped to FHIR R4B element `ElementDefinition.condition` as `Equivalent`.
420. Extension.extension:condition.url
Control	1..1
Fixed Value	`condition`
422. Extension.extension:condition.value[x]
Definition	A reference to an invariant that may make additional statements about the cardinality or value in the instance.
Short	Reference to invariant about presence
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
424. Extension.extension:constraint
Slice Name	constraint
Definition	STU3: `ElementDefinition.constraint`
Short	STU3: constraint
Comments	Element `ElementDefinition.constraint` is mapped to FHIR R4B element `ElementDefinition.constraint` as `Equivalent`. Constraints should be declared on the "context" element - the lowest element in the hierarchy that is common to all nodes referenced by the constraint.
Control	0..*
Requirements	Element `ElementDefinition.constraint` is mapped to FHIR R4B element `ElementDefinition.constraint` as `Equivalent`.
426. Extension.extension:constraint.extension
Control	4..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
428. Extension.extension:constraint.extension:key
Slice Name	key
Definition	STU3: `ElementDefinition.constraint.key`
Short	STU3: key
Comments	Element `ElementDefinition.constraint.key` is mapped to FHIR R4B element `ElementDefinition.constraint.key` as `Equivalent`.
Control	1..1
Requirements	Element `ElementDefinition.constraint.key` is mapped to FHIR R4B element `ElementDefinition.constraint.key` as `Equivalent`.
430. Extension.extension:constraint.extension:key.url
Control	1..1
Fixed Value	`key`
432. Extension.extension:constraint.extension:key.value[x]
Definition	Allows identification of which elements have their cardinalities impacted by the constraint. Will not be referenced for constraints that do not affect cardinality.
Short	Target of 'condition' reference above
Control	1..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
434. Extension.extension:constraint.extension:requirements
Slice Name	requirements
Definition	STU3: `ElementDefinition.constraint.requirements`
Short	STU3: requirements
Comments	Element `ElementDefinition.constraint.requirements` is mapped to FHIR R4B element `ElementDefinition.constraint.requirements` as `Equivalent`. To be used if the reason for the constraint may not be intuitive to all implementers.
Control	0..1
Requirements	Element `ElementDefinition.constraint.requirements` is mapped to FHIR R4B element `ElementDefinition.constraint.requirements` as `Equivalent`.
436. Extension.extension:constraint.extension:requirements.url
Control	1..1
Fixed Value	`requirements`
438. Extension.extension:constraint.extension:requirements.value[x]
Definition	Description of why this constraint is necessary or appropriate.
Short	Why this constraint is necessary or appropriate
Comments	To be used if the reason for the constraint may not be intuitive to all implementers.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
440. Extension.extension:constraint.extension:severity
Slice Name	severity
Definition	STU3: `ElementDefinition.constraint.severity`
Short	STU3: severity
Comments	Element `ElementDefinition.constraint.severity` is mapped to FHIR R4B element `ElementDefinition.constraint.severity` as `Equivalent`. This allows constraints to be asserted as "shall" (error) and "should" (warning).
Control	1..1
Requirements	Element `ElementDefinition.constraint.severity` is mapped to FHIR R4B element `ElementDefinition.constraint.severity` as `Equivalent`.
442. Extension.extension:constraint.extension:severity.url
Control	1..1
Fixed Value	`severity`
444. Extension.extension:constraint.extension:severity.value[x]
Definition	Identifies the impact constraint violation has on the conformance of the instance.
Short	error \| warning
Comments	This allows constraints to be asserted as "shall" (error) and "should" (warning).
Control	1..1
Binding	The codes SHALL be taken from ConstraintSeverity (required to `http://hl7.org/fhir/ValueSet/constraint-severity\|4.3.0`) SHALL applications comply with this constraint?
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
446. Extension.extension:constraint.extension:human
Slice Name	human
Definition	STU3: `ElementDefinition.constraint.human`
Short	STU3: human
Comments	Element `ElementDefinition.constraint.human` is mapped to FHIR R4B element `ElementDefinition.constraint.human` as `Equivalent`. Should be expressed in business terms as much as possible.
Control	1..1
Requirements	Element `ElementDefinition.constraint.human` is mapped to FHIR R4B element `ElementDefinition.constraint.human` as `Equivalent`.
448. Extension.extension:constraint.extension:human.url
Control	1..1
Fixed Value	`human`
450. Extension.extension:constraint.extension:human.value[x]
Definition	Text that can be used to describe the constraint in messages identifying that the constraint has been violated.
Short	Human description of constraint
Comments	Should be expressed in business terms as much as possible.
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
452. Extension.extension:constraint.extension:expression
Slice Name	expression
Definition	STU3: `ElementDefinition.constraint.expression`
Short	STU3: expression
Comments	Element `ElementDefinition.constraint.expression` is mapped to FHIR R4B element `ElementDefinition.constraint.expression` as `Equivalent`.
Control	1..1
Requirements	Used by validation tooling tests of the validity of the resource. Element `ElementDefinition.constraint.expression` is mapped to FHIR R4B element `ElementDefinition.constraint.expression` as `Equivalent`.
454. Extension.extension:constraint.extension:expression.url
Control	1..1
Fixed Value	`expression`
456. Extension.extension:constraint.extension:expression.value[x]
Definition	A FHIRPath expression of constraint that can be executed to see if this constraint is met.
Short	FHIRPath expression of constraint
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
458. Extension.extension:constraint.extension:xpath
Slice Name	xpath
Definition	STU3: `ElementDefinition.constraint.xpath`
Short	STU3: xpath
Comments	Element `ElementDefinition.constraint.xpath` is mapped to FHIR R4B element `ElementDefinition.constraint.xpath` as `Equivalent`. Elements SHALL use "f" as the namespace prefix for the FHIR namespace, and "x" for the xhtml namespace, and SHALL NOT use any other prefixes. Note: we are considering deprecating the xpath element. Implementer feedback is welcome.
Control	0..1
Requirements	Used in Schematron tests of the validity of the resource. Element `ElementDefinition.constraint.xpath` is mapped to FHIR R4B element `ElementDefinition.constraint.xpath` as `Equivalent`.
460. Extension.extension:constraint.extension:xpath.url
Control	1..1
Fixed Value	`xpath`
462. Extension.extension:constraint.extension:xpath.value[x]
Definition	An XPath expression of constraint that can be executed to see if this constraint is met.
Short	XPath expression of constraint
Comments	Elements SHALL use "f" as the namespace prefix for the FHIR namespace, and "x" for the xhtml namespace, and SHALL NOT use any other prefixes. Note: we are considering deprecating the xpath element. Implementer feedback is welcome.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
464. Extension.extension:constraint.extension:source
Slice Name	source
Definition	STU3: `ElementDefinition.constraint.source`
Short	STU3: source
Comments	Element `ElementDefinition.constraint.source` is mapped to FHIR R4B element `ElementDefinition.constraint.source` as `Equivalent`. This is used when, e.g. rendering, where it is not useful to present inherited constraints when rendering the snapshot.
Control	0..1
Requirements	Element `ElementDefinition.constraint.source` is mapped to FHIR R4B element `ElementDefinition.constraint.source` as `Equivalent`.
466. Extension.extension:constraint.extension:source.url
Control	1..1
Fixed Value	`source`
468. Extension.extension:constraint.extension:source.value[x]
Definition	A reference to the original source of the constraint, for traceability purposes.
Short	Reference to original source of constraint
Comments	This is used when, e.g. rendering, where it is not useful to present inherited constraints when rendering the snapshot.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
470. Extension.extension:constraint.url
Control	1..1
Fixed Value	`constraint`
472. Extension.extension:constraint.value[x]
Control	0..0
474. Extension.extension:mustSupport
Slice Name	mustSupport
Definition	STU3: `ElementDefinition.mustSupport`
Short	STU3: If the element must supported
Comments	Element `ElementDefinition.mustSupport` is mapped to FHIR R4B element `ElementDefinition.mustSupport` as `Equivalent`. "Something useful" is context dependent and impossible to describe in the base FHIR specification. For this reason, tue mustSupport flag is never set to true by the FHIR specification itself - it is only set to true in profiles. This is done in Resource Profiles, where the profile labels an element as mustSupport=true. When a profile does this, it SHALL also make clear exactly what kind of "support" is required, as this can mean many things. Note that an element that has the property IsModifier is not necessarily a "key" element (e.g. one of the important elements to make use of the resource), nor is it automatically mustSupport - however both of these things are more likely to be true for IsModifier elements than for other elements.
Control	0..1
Requirements	Allows a profile to set expectations for system capabilities beyond merely respecting cardinality constraints. Element `ElementDefinition.mustSupport` is mapped to FHIR R4B element `ElementDefinition.mustSupport` as `Equivalent`.
476. Extension.extension:mustSupport.url
Control	1..1
Fixed Value	`mustSupport`
478. Extension.extension:mustSupport.value[x]
Definition	If true, implementations that produce or consume resources SHALL provide "support" for the element in some meaningful way. If false, the element may be ignored and not supported.
Short	If the element must supported
Comments	"Something useful" is context dependent and impossible to describe in the base FHIR specification. For this reason, tue mustSupport flag is never set to true by the FHIR specification itself - it is only set to true in profiles. This is done in Resource Profiles, where the profile labels an element as mustSupport=true. When a profile does this, it SHALL also make clear exactly what kind of "support" is required, as this can mean many things. Note that an element that has the property IsModifier is not necessarily a "key" element (e.g. one of the important elements to make use of the resource), nor is it automatically mustSupport - however both of these things are more likely to be true for IsModifier elements than for other elements.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
480. Extension.extension:isModifier
Slice Name	isModifier
Definition	STU3: `ElementDefinition.isModifier`
Short	STU3: isModifier
Comments	Element `ElementDefinition.isModifier` is mapped to FHIR R4B element `ElementDefinition.isModifier` as `Equivalent`. Only the definition of an element can set IsModifier true - either the specification itself or where an extension is originally defined. Once set, it cannot be changed in derived profiles. An element/extension that has isModifier=true SHOULD also have a minimum cardinality of 1, so that there is no lack of clarity about what to do if it is missing. If it can be missing, the definition SHALL make the meaning of a missing element clear.
Control	0..1
Requirements	Allows elements to be introduced into a specification that can't safely be ignored by applications that don't recognize them. Element `ElementDefinition.isModifier` is mapped to FHIR R4B element `ElementDefinition.isModifier` as `Equivalent`.
482. Extension.extension:isModifier.url
Control	1..1
Fixed Value	`isModifier`
484. Extension.extension:isModifier.value[x]
Definition	If true, the value of this element affects the interpretation of the element or resource that contains it, and the value of the element cannot be ignored. Typically, this is used for status, negation and qualification codes. The effect of this is that the element cannot be ignored by systems: they SHALL either recognize the element and process it, and/or a pre-determination has been made that it is not relevant to their particular system.
Short	If this modifies the meaning of other elements
Comments	Only the definition of an element can set IsModifier true - either the specification itself or where an extension is originally defined. Once set, it cannot be changed in derived profiles. An element/extension that has isModifier=true SHOULD also have a minimum cardinality of 1, so that there is no lack of clarity about what to do if it is missing. If it can be missing, the definition SHALL make the meaning of a missing element clear.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
486. Extension.extension:isSummary
Slice Name	isSummary
Definition	STU3: `ElementDefinition.isSummary`
Short	STU3: isSummary
Comments	Element `ElementDefinition.isSummary` is mapped to FHIR R4B element `ElementDefinition.isSummary` as `Equivalent`. Some resources include a set of simple metadata, and some very large data. This element is used to reduce the quantity of data returned in searches. Note that servers may pre-cache summarized resources for optimal performance, so servers may not support per-profile use of the isSummary flag. When a request is made with _summary=true, serailisers only include elements marked as 'isSummary = true'. Other than Attachment.data, all data type properties are included in the summary form. Modifier elements or elements with minimum cardinality = 1 must be marked as summary elements.
Control	0..1
Requirements	Allow clients to search through large resources quickly. Element `ElementDefinition.isSummary` is mapped to FHIR R4B element `ElementDefinition.isSummary` as `Equivalent`.
488. Extension.extension:isSummary.url
Control	1..1
Fixed Value	`isSummary`
490. Extension.extension:isSummary.value[x]
Definition	Whether the element should be included if a client requests a search with the parameter _summary=true.
Short	Include when _summary = true?
Comments	Some resources include a set of simple metadata, and some very large data. This element is used to reduce the quantity of data returned in searches. Note that servers may pre-cache summarized resources for optimal performance, so servers may not support per-profile use of the isSummary flag. When a request is made with _summary=true, serailisers only include elements marked as 'isSummary = true'. Other than Attachment.data, all data type properties are included in the summary form. Modifier elements or elements with minimum cardinality = 1 must be marked as summary elements.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
492. Extension.extension:binding
Slice Name	binding
Definition	STU3: `ElementDefinition.binding`
Short	STU3: binding
Comments	Element `ElementDefinition.binding` is mapped to FHIR R4B element `ElementDefinition.binding` as `Equivalent`. For a CodeableConcept, when no codes are allowed - only text, use a binding of strength "required" with a description explaining that no coded values are allowed and what sort of information to put in the "text" element.
Control	0..1
Requirements	Element `ElementDefinition.binding` is mapped to FHIR R4B element `ElementDefinition.binding` as `Equivalent`.
494. Extension.extension:binding.extension
Control	1..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
496. Extension.extension:binding.extension:strength
Slice Name	strength
Definition	STU3: `ElementDefinition.binding.strength`
Short	STU3: strength
Comments	Element `ElementDefinition.binding.strength` is mapped to FHIR R4B element `ElementDefinition.binding.strength` as `Equivalent`. For further discussion, see Using Terminologies.
Control	1..1
Requirements	Element `ElementDefinition.binding.strength` is mapped to FHIR R4B element `ElementDefinition.binding.strength` as `Equivalent`.
498. Extension.extension:binding.extension:strength.url
Control	1..1
Fixed Value	`strength`
500. Extension.extension:binding.extension:strength.value[x]
Definition	Indicates the degree of conformance expectations associated with this binding - that is, the degree to which the provided value set must be adhered to in the instances.
Short	required \| extensible \| preferred \| example
Comments	For further discussion, see Using Terminologies.
Control	1..1
Binding	The codes SHALL be taken from BindingStrength (required to `http://hl7.org/fhir/ValueSet/binding-strength\|4.3.0`) Indication of the degree of conformance expectations associated with a binding.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
502. Extension.extension:binding.extension:description
Slice Name	description
Definition	STU3: `ElementDefinition.binding.description`
Short	STU3: description
Comments	Element `ElementDefinition.binding.description` is mapped to FHIR R4B element `ElementDefinition.binding.description` as `Equivalent`.
Control	0..1
Requirements	Element `ElementDefinition.binding.description` is mapped to FHIR R4B element `ElementDefinition.binding.description` as `Equivalent`.
504. Extension.extension:binding.extension:description.url
Control	1..1
Fixed Value	`description`
506. Extension.extension:binding.extension:description.value[x]
Definition	Describes the intended use of this particular set of codes.
Short	Human explanation of the value set
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
508. Extension.extension:binding.extension:valueSet
Slice Name	valueSet
Definition	STU3: `ElementDefinition.binding.valueSet[x]` additional types (Reference(http://hl7.org/fhir/StructureDefinition/ValueSet)) additional types from child elements (display, identifier, reference)
Short	STU3: Source of value set additional types
Comments	Element `ElementDefinition.binding.valueSet[x]` is mapped to FHIR R4B element `ElementDefinition.binding.valueSet` as `SourceIsBroaderThanTarget`. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types: Reference. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types based on type expansion: display, identifier, reference. For value sets with a referenceResource, the display can contain the value set description. The reference may be version-specific or not.
Control	0..1
Requirements	Element `ElementDefinition.binding.valueSet[x]` is mapped to FHIR R4B element `ElementDefinition.binding.valueSet` as `SourceIsBroaderThanTarget`. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types: Reference. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types based on type expansion: display, identifier, reference.
510. Extension.extension:binding.extension:valueSet.url
Control	1..1
Fixed Value	`valueSet`
512. Extension.extension:binding.extension:valueSet.value[x]
Definition	Points to the value set or external definition (e.g. implicit value set) that identifies the set of codes to be used. If the binding refers to an explicit value set - the normal case - then use a Reference(ValueSet) preferably containing the canonical URL for the value set. If the reference is to an implicit value set - usually, an IETF RFC that defines a grammar, such as mime types - then use a uri.
Short	Source of value set
Comments	For value sets with a referenceResource, the display can contain the value set description. The reference may be version-specific or not.
Control	0..1
Type	Reference(Cross-version Profile for STU3.ValueSet for use in FHIR R4B, ValueSet)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
514. Extension.extension:binding.url
Control	1..1
Fixed Value	`binding`
516. Extension.extension:binding.value[x]
Control	0..0
518. Extension.extension:mapping
Slice Name	mapping
Definition	STU3: `ElementDefinition.mapping`
Short	STU3: mapping
Comments	Element `ElementDefinition.mapping` is mapped to FHIR R4B element `ElementDefinition.mapping` as `Equivalent`. Mappings are not necessarily specific enough for safe translation.
Control	0..*
Requirements	Provides guidance to implementers familiar with or converting content from other specifications. Element `ElementDefinition.mapping` is mapped to FHIR R4B element `ElementDefinition.mapping` as `Equivalent`.
520. Extension.extension:mapping.extension
Control	2..*
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
522. Extension.extension:mapping.extension:identity
Slice Name	identity
Definition	STU3: `ElementDefinition.mapping.identity`
Short	STU3: identity
Comments	Element `ElementDefinition.mapping.identity` is mapped to FHIR R4B element `ElementDefinition.mapping.identity` as `Equivalent`.
Control	1..1
Requirements	Element `ElementDefinition.mapping.identity` is mapped to FHIR R4B element `ElementDefinition.mapping.identity` as `Equivalent`.
524. Extension.extension:mapping.extension:identity.url
Control	1..1
Fixed Value	`identity`
526. Extension.extension:mapping.extension:identity.value[x]
Definition	An internal reference to the definition of a mapping.
Short	Reference to mapping declaration
Control	1..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
528. Extension.extension:mapping.extension:language
Slice Name	language
Definition	STU3: `ElementDefinition.mapping.language`
Short	STU3: language
Comments	Element `ElementDefinition.mapping.language` is mapped to FHIR R4B element `ElementDefinition.mapping.language` as `Equivalent`. If omitted, then there can be no expectation of computational interpretation of the mapping.
Control	0..1
Requirements	Element `ElementDefinition.mapping.language` is mapped to FHIR R4B element `ElementDefinition.mapping.language` as `Equivalent`.
530. Extension.extension:mapping.extension:language.url
Control	1..1
Fixed Value	`language`
532. Extension.extension:mapping.extension:language.value[x]
Definition	Identifies the computable language in which mapping.map is expressed.
Short	Computable language of mapping
Comments	If omitted, then there can be no expectation of computational interpretation of the mapping.
Control	0..1
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
534. Extension.extension:mapping.extension:map
Slice Name	map
Definition	STU3: `ElementDefinition.mapping.map`
Short	STU3: map
Comments	Element `ElementDefinition.mapping.map` is mapped to FHIR R4B element `ElementDefinition.mapping.map` as `Equivalent`. For most mappings, the syntax is undefined. Syntax will be provided for mappings to the RIM. Multiple mappings may be possible and may include constraints on other resource elements that identify when a particular mapping applies.
Control	1..1
Requirements	Element `ElementDefinition.mapping.map` is mapped to FHIR R4B element `ElementDefinition.mapping.map` as `Equivalent`.
536. Extension.extension:mapping.extension:map.url
Control	1..1
Fixed Value	`map`
538. Extension.extension:mapping.extension:map.value[x]
Definition	Expresses what part of the target specification corresponds to this element.
Short	Details of the mapping
Comments	For most mappings, the syntax is undefined. Syntax will be provided for mappings to the RIM. Multiple mappings may be possible and may include constraints on other resource elements that identify when a particular mapping applies.
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
540. Extension.extension:mapping.extension:comment
Slice Name	comment
Definition	STU3: `ElementDefinition.mapping.comment`
Short	STU3: comment
Comments	Element `ElementDefinition.mapping.comment` is mapped to FHIR R4B element `ElementDefinition.mapping.comment` as `Equivalent`.
Control	0..1
Requirements	Element `ElementDefinition.mapping.comment` is mapped to FHIR R4B element `ElementDefinition.mapping.comment` as `Equivalent`.
542. Extension.extension:mapping.extension:comment.url
Control	1..1
Fixed Value	`comment`
544. Extension.extension:mapping.extension:comment.value[x]
Definition	Comments that provide information about the mapping or its use.
Short	Comments about the mapping or its use
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
546. Extension.extension:mapping.url
Control	1..1
Fixed Value	`mapping`
548. Extension.extension:mapping.value[x]
Control	0..0
550. Extension.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/3.0/StructureDefinition/extension-DataElement.element`
552. Extension.value[x]
Control	0..0

Guidance on how to interpret the contents of this table can be foundhere

0. Extension
Definition	STU3: `DataElement.element` additional types (ElementDefinition) additional types from child elements (alias, base, max, min, path, binding, description, strength, valueSet[x], code, comment, condition, constraint, expression, human, key, requirements, severity, source, xpath, contentReference, defaultValue[x], definition, example, label, value[x], fixed[x], isModifier, isSummary, mapping, identity, language, map, maxLength, maxValue[x], meaningWhenMissing, minValue[x], mustSupport, orderMeaning, pattern[x], representation, short, sliceName, slicing, discriminator, type, ordered, rules, aggregation, profile, targetProfile, versioning)
Short	STU3: Definition of element additional types
Comments	Element `DataElement.element` is mapped to FHIR R4B element `StructureDefinition.differential.element` as `SourceIsBroaderThanTarget`. The mappings for `DataElement.element` do not cover the following types: ElementDefinition. The mappings for `DataElement.element` do not cover the following types based on type expansion: aggregation, alias, base, binding, code, comment, condition, constraint, contentReference, defaultValue[x], definition, description, discriminator, example, expression, fixed[x], human, identity, isModifier, isSummary, key, label, language, map, mapping, max, maxLength, maxValue[x], meaningWhenMissing, min, minValue[x], mustSupport, ordered, orderMeaning, path, pattern[x], profile, representation, requirements, rules, severity, short, sliceName, slicing, source, strength, targetProfile, type, value[x], valueSet[x], versioning, xpath. For simple data types there will only be one repetition. For complex data types, multiple repetitions will be present defining a nested structure using the "path" element.
Control	1..* This element is affected by the following invariants: ele-1
Is Modifier	false
Invariants	ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (`hasValue() or (children().count() > id.count()) or $this is Parameters`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
2. Extension.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
4. Extension.extension
Definition	An Extension
Short	Extension
Control	1..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `ElementDefinition` in FHIR R4B
Short	DataType slice for a FHIR STU3 `ElementDefinition` value
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
8. Extension.extension:_datatype.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
10. Extension.extension:_datatype.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
12. Extension.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
14. Extension.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: ElementDefinition
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`ElementDefinition`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
16. Extension.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.path`
Short	STU3: path
Comments	Element `ElementDefinition.path` is mapped to FHIR R4B element `ElementDefinition.path` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.path` is mapped to FHIR R4B element `ElementDefinition.path` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
18. Extension.extension:path.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
20. Extension.extension:path.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
22. Extension.extension:path.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`path`
24. Extension.extension:path.value[x]
Definition	The path identifies the element and is expressed as a "."-separated list of ancestor elements, beginning with the name of the resource or extension.
Short	Path of the element in the hierarchy of elements
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
26. Extension.extension:representation
Slice Name	representation
Definition	STU3: `ElementDefinition.representation`
Short	STU3: representation
Comments	Element `ElementDefinition.representation` is mapped to FHIR R4B element `ElementDefinition.representation` as `Equivalent`. In resources, this is rarely used except for special cases where the representation deviates from the normal, and can only be done in the base standard (and profiles must reproduce what the base standard does). This element is used quite commonly in Logical models when the logical models represent a specific serialization format (e.g. CDA, v2 etc).
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.representation` is mapped to FHIR R4B element `ElementDefinition.representation` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
28. Extension.extension:representation.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
30. Extension.extension:representation.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
32. Extension.extension:representation.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`representation`
34. Extension.extension:representation.value[x]
Definition	Codes that define how this element is represented in instances, when the deviation varies from the normal case.
Short	xmlAttr \| xmlText \| typeAttr \| cdaText \| xhtml
Comments	In resources, this is rarely used except for special cases where the representation deviates from the normal, and can only be done in the base standard (and profiles must reproduce what the base standard does). This element is used quite commonly in Logical models when the logical models represent a specific serialization format (e.g. CDA, v2 etc).
Control	0..1
Binding	The codes SHALL be taken from PropertyRepresentation (required to `http://hl7.org/fhir/ValueSet/property-representation\|4.3.0`) How a property is represented when serialized.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
36. Extension.extension:sliceName
Slice Name	sliceName
Definition	STU3: `ElementDefinition.sliceName`
Short	STU3: sliceName
Comments	Element `ElementDefinition.sliceName` is mapped to FHIR R4B element `ElementDefinition.sliceName` as `Equivalent`. The name SHALL be unique within the structure within the context of the constrained resource element. (Though to avoid confusion, uniqueness across all elements is recommended.).
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	May also be used for code generation purposes. Element `ElementDefinition.sliceName` is mapped to FHIR R4B element `ElementDefinition.sliceName` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
38. Extension.extension:sliceName.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
40. Extension.extension:sliceName.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
42. Extension.extension:sliceName.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`sliceName`
44. Extension.extension:sliceName.value[x]
Definition	The name of this element definition slice, when slicing is working. The name must be a token with no dots or spaces. This is a unique name referring to a specific set of constraints applied to this element, used to provide a name to different slices of the same element.
Short	Name for this particular element (in a set of slices)
Comments	The name SHALL be unique within the structure within the context of the constrained resource element. (Though to avoid confusion, uniqueness across all elements is recommended.).
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
46. Extension.extension:label
Slice Name	label
Definition	STU3: `ElementDefinition.label`
Short	STU3: label
Comments	Element `ElementDefinition.label` is mapped to FHIR R4B element `ElementDefinition.label` as `Equivalent`. See also the extension (http://hl7.org/fhir/StructureDefinition/elementdefinition-question)[extension-elementdefinition-question.html].
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.label` is mapped to FHIR R4B element `ElementDefinition.label` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
48. Extension.extension:label.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
50. Extension.extension:label.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
52. Extension.extension:label.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`label`
54. Extension.extension:label.value[x]
Definition	A single preferred label which is the text to display beside the element indicating its meaning or to use to prompt for the element in a user display or form.
Short	Name for element to display with or prompt for element
Comments	See also the extension (http://hl7.org/fhir/StructureDefinition/elementdefinition-question)[extension-elementdefinition-question.html].
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
56. Extension.extension:code
Slice Name	code
Definition	STU3: `ElementDefinition.code`
Short	STU3: code
Comments	Element `ElementDefinition.code` is mapped to FHIR R4B element `ElementDefinition.code` as `Equivalent`. The concept SHALL be properly aligned with the data element definition and other constraints, as defined in the code system, including relationships, of any code listed here. Where multiple codes exist in a terminology that could correspond to the data element, the most granular code(s) should be selected, so long as they are not more restrictive than the data element itself. The mappings may be used to provide more or less granular or structured equivalences in the code system.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Links the meaning of an element to an external terminology, and is very useful for searching and indexing. Element `ElementDefinition.code` is mapped to FHIR R4B element `ElementDefinition.code` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
58. Extension.extension:code.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
60. Extension.extension:code.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
62. Extension.extension:code.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`code`
64. Extension.extension:code.value[x]
Definition	A code that has the same meaning as the element in a particular terminology.
Short	Corresponding codes in terminologies
Comments	The concept SHALL be properly aligned with the data element definition and other constraints, as defined in the code system, including relationships, of any code listed here. Where multiple codes exist in a terminology that could correspond to the data element, the most granular code(s) should be selected, so long as they are not more restrictive than the data element itself. The mappings may be used to provide more or less granular or structured equivalences in the code system.
Control	0..1
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
66. Extension.extension:slicing
Slice Name	slicing
Definition	STU3: `ElementDefinition.slicing`
Short	STU3: slicing
Comments	Element `ElementDefinition.slicing` is mapped to FHIR R4B element `ElementDefinition.slicing` as `Equivalent`. The first element in the sequence, the one that carries the slicing, is the definition that applies to all the slices. This is based on the unconstrained element, but can apply any constraints as appropriate. This may include the common constraints on the children of the element.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing` is mapped to FHIR R4B element `ElementDefinition.slicing` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
68. Extension.extension:slicing.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
70. Extension.extension:slicing.extension
Definition	An Extension
Short	Extension
Control	1..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
72. Extension.extension:slicing.extension:discriminator
Slice Name	discriminator
Definition	STU3: `ElementDefinition.slicing.discriminator`
Short	STU3: discriminator
Comments	Element `ElementDefinition.slicing.discriminator` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator` as `Equivalent`. If there is no discriminator, the content is hard to process, so this should be avoided. If the base element has a cardinality of ..1, and there is a choice of types, the discriminator must be "@type".
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.discriminator` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
74. Extension.extension:slicing.extension:discriminator.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
76. Extension.extension:slicing.extension:discriminator.extension
Definition	An Extension
Short	Extension
Control	2..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
78. Extension.extension:slicing.extension:discriminator.extension:type
Slice Name	type
Definition	STU3: `ElementDefinition.slicing.discriminator.type`
Short	STU3: type
Comments	Element `ElementDefinition.slicing.discriminator.type` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.type` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.discriminator.type` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.type` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
80. Extension.extension:slicing.extension:discriminator.extension:type.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
82. Extension.extension:slicing.extension:discriminator.extension:type.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
84. Extension.extension:slicing.extension:discriminator.extension:type.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`type`
86. Extension.extension:slicing.extension:discriminator.extension:type.value[x]
Definition	How the element value is interpreted when discrimination is evaluated.
Short	value \| exists \| pattern \| type \| profile
Control	1..1
Binding	The codes SHALL be taken from DiscriminatorType (required to `http://hl7.org/fhir/ValueSet/discriminator-type\|4.3.0`) How an element value is interpreted when discrimination is evaluated
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
88. Extension.extension:slicing.extension:discriminator.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.slicing.discriminator.path`
Short	STU3: path
Comments	Element `ElementDefinition.slicing.discriminator.path` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.path` as `Equivalent`. The only FHIRPath functions that are allowed are resolve(), and extension(url).
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.discriminator.path` is mapped to FHIR R4B element `ElementDefinition.slicing.discriminator.path` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
90. Extension.extension:slicing.extension:discriminator.extension:path.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
92. Extension.extension:slicing.extension:discriminator.extension:path.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
94. Extension.extension:slicing.extension:discriminator.extension:path.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`path`
96. Extension.extension:slicing.extension:discriminator.extension:path.value[x]
Definition	A FHIRPath expression, using a restricted subset of FHIRPath, that is used to identify the element on which discrimination is based.
Short	Path to element value
Comments	The only FHIRPath functions that are allowed are resolve(), and extension(url).
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
98. Extension.extension:slicing.extension:discriminator.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`discriminator`
100. Extension.extension:slicing.extension:discriminator.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
102. Extension.extension:slicing.extension:description
Slice Name	description
Definition	STU3: `ElementDefinition.slicing.description`
Short	STU3: description
Comments	Element `ElementDefinition.slicing.description` is mapped to FHIR R4B element `ElementDefinition.slicing.description` as `Equivalent`. If it's really not possible to differentiate them, the design should be re-evaluated to make the content usable.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.description` is mapped to FHIR R4B element `ElementDefinition.slicing.description` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
104. Extension.extension:slicing.extension:description.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
106. Extension.extension:slicing.extension:description.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
108. Extension.extension:slicing.extension:description.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`description`
110. Extension.extension:slicing.extension:description.value[x]
Definition	A human-readable text description of how the slicing works. If there is no discriminator, this is required to be present to provide whatever information is possible about how the slices can be differentiated.
Short	Text description of how slicing works (or not)
Comments	If it's really not possible to differentiate them, the design should be re-evaluated to make the content usable.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
112. Extension.extension:slicing.extension:ordered
Slice Name	ordered
Definition	STU3: `ElementDefinition.slicing.ordered`
Short	STU3: ordered
Comments	Element `ElementDefinition.slicing.ordered` is mapped to FHIR R4B element `ElementDefinition.slicing.ordered` as `Equivalent`. Order should only be required when it is a pressing concern for presentation. Profile authors should consider making the order a feature of the rules about the narrative, not the rules about the data - requiring ordered data makes the profile much less re-usable.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.ordered` is mapped to FHIR R4B element `ElementDefinition.slicing.ordered` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
114. Extension.extension:slicing.extension:ordered.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
116. Extension.extension:slicing.extension:ordered.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
118. Extension.extension:slicing.extension:ordered.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`ordered`
120. Extension.extension:slicing.extension:ordered.value[x]
Definition	If the matching elements have to occur in the same order as defined in the profile.
Short	If elements must be in same order as slices
Comments	Order should only be required when it is a pressing concern for presentation. Profile authors should consider making the order a feature of the rules about the narrative, not the rules about the data - requiring ordered data makes the profile much less re-usable.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
122. Extension.extension:slicing.extension:rules
Slice Name	rules
Definition	STU3: `ElementDefinition.slicing.rules`
Short	STU3: rules
Comments	Element `ElementDefinition.slicing.rules` is mapped to FHIR R4B element `ElementDefinition.slicing.rules` as `Equivalent`. Allowing additional elements makes for a much for flexible template - it's open for use in wider contexts, but also means that the content of the resource is not closed, and applications have to decide how to handle content not described by the profile.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.slicing.rules` is mapped to FHIR R4B element `ElementDefinition.slicing.rules` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
124. Extension.extension:slicing.extension:rules.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
126. Extension.extension:slicing.extension:rules.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
128. Extension.extension:slicing.extension:rules.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`rules`
130. Extension.extension:slicing.extension:rules.value[x]
Definition	Whether additional slices are allowed or not. When the slices are ordered, profile authors can also say that additional slices are only allowed at the end.
Short	closed \| open \| openAtEnd
Comments	Allowing additional elements makes for a much for flexible template - it's open for use in wider contexts, but also means that the content of the resource is not closed, and applications have to decide how to handle content not described by the profile.
Control	1..1
Binding	The codes SHALL be taken from SlicingRules (required to `http://hl7.org/fhir/ValueSet/resource-slicing-rules\|4.3.0`) How slices are interpreted when evaluating an instance.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
132. Extension.extension:slicing.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`slicing`
134. Extension.extension:slicing.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
136. Extension.extension:short
Slice Name	short
Definition	STU3: `ElementDefinition.short`
Short	STU3: short
Comments	Element `ElementDefinition.short` is mapped to FHIR R4B element `ElementDefinition.short` as `Equivalent`. May change the term to provide language more appropriate to the context of the profile or to reflect slicing.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.short` is mapped to FHIR R4B element `ElementDefinition.short` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
138. Extension.extension:short.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
140. Extension.extension:short.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
142. Extension.extension:short.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`short`
144. Extension.extension:short.value[x]
Definition	A concise description of what this element means (e.g. for use in autogenerated summaries).
Short	Concise definition for space-constrained presentation
Comments	May change the term to provide language more appropriate to the context of the profile or to reflect slicing.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
146. Extension.extension:definition
Slice Name	definition
Definition	STU3: `ElementDefinition.definition`
Short	STU3: definition
Comments	Element `ElementDefinition.definition` is mapped to FHIR R4B element `ElementDefinition.definition` as `Equivalent`. It is easy for a different definition to change the meaning of an element and this can have nasty downstream consequences. Please be careful when providing definitions.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	To allow a user to state the usage of an element in a particular context. Element `ElementDefinition.definition` is mapped to FHIR R4B element `ElementDefinition.definition` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
148. Extension.extension:definition.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
150. Extension.extension:definition.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
152. Extension.extension:definition.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`definition`
154. Extension.extension:definition.value[x]
Definition	Provides a complete explanation of the meaning of the data element for human readability. For the case of elements derived from existing elements (e.g. constraints), the definition SHALL be consistent with the base definition, but convey the meaning of the element in the particular context of use of the resource.
Short	Full formal definition as narrative text
Comments	It is easy for a different definition to change the meaning of an element and this can have nasty downstream consequences. Please be careful when providing definitions.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
156. Extension.extension:comment
Slice Name	comment
Definition	STU3: `ElementDefinition.comment`
Short	STU3: comment
Comments	Element `ElementDefinition.comment` is mapped to FHIR R4B element `ElementDefinition.comment` as `Equivalent`. If it is possible to capture usage rules using constraints, that mechanism should be used in preference to this element.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.comment` is mapped to FHIR R4B element `ElementDefinition.comment` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
158. Extension.extension:comment.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
160. Extension.extension:comment.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
162. Extension.extension:comment.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`comment`
164. Extension.extension:comment.value[x]
Definition	Explanatory notes and implementation guidance about the data element, including notes about how to use the data properly, exceptions to proper use, etc.
Short	Comments about the use of this element
Comments	If it is possible to capture usage rules using constraints, that mechanism should be used in preference to this element.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
166. Extension.extension:requirements
Slice Name	requirements
Definition	STU3: `ElementDefinition.requirements`
Short	STU3: requirements
Comments	Element `ElementDefinition.requirements` is mapped to FHIR R4B element `ElementDefinition.requirements` as `Equivalent`. This element does not describe the usage of the element (that's done in comments), rather it's for traceability of why the element is either needed or why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this data element.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.requirements` is mapped to FHIR R4B element `ElementDefinition.requirements` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
168. Extension.extension:requirements.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
170. Extension.extension:requirements.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
172. Extension.extension:requirements.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`requirements`
174. Extension.extension:requirements.value[x]
Definition	This element is for traceability of why the element was created and why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this element.
Short	Why this resource has been created
Comments	This element does not describe the usage of the element (that's done in comments), rather it's for traceability of why the element is either needed or why the constraints exist as they do. This may be used to point to source materials or specifications that drove the structure of this data element.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
176. Extension.extension:alias
Slice Name	alias
Definition	STU3: `ElementDefinition.alias`
Short	STU3: alias
Comments	Element `ElementDefinition.alias` is mapped to FHIR R4B element `ElementDefinition.alias` as `Equivalent`.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allows for better easier recognition of the element by multiple communities, including international communities. Element `ElementDefinition.alias` is mapped to FHIR R4B element `ElementDefinition.alias` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
178. Extension.extension:alias.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
180. Extension.extension:alias.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
182. Extension.extension:alias.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`alias`
184. Extension.extension:alias.value[x]
Definition	Identifies additional names by which this element might also be known.
Short	Other names
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
186. Extension.extension:min
Slice Name	min
Definition	STU3: `ElementDefinition.min`
Short	STU3: min
Comments	Element `ElementDefinition.min` is mapped to FHIR R4B element `ElementDefinition.min` as `Equivalent`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.min` is mapped to FHIR R4B element `ElementDefinition.min` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
188. Extension.extension:min.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
190. Extension.extension:min.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
192. Extension.extension:min.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`min`
194. Extension.extension:min.value[x]
Definition	The minimum number of times this element SHALL appear in the instance.
Short	Minimum Cardinality
Control	0..1
Type	unsignedInt
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
196. Extension.extension:max
Slice Name	max
Definition	STU3: `ElementDefinition.max`
Short	STU3: max
Comments	Element `ElementDefinition.max` is mapped to FHIR R4B element `ElementDefinition.max` as `Equivalent`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.max` is mapped to FHIR R4B element `ElementDefinition.max` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
198. Extension.extension:max.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
200. Extension.extension:max.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
202. Extension.extension:max.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`max`
204. Extension.extension:max.value[x]
Definition	The maximum number of times this element is permitted to appear in the instance.
Short	Maximum Cardinality (a number or *)
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
206. Extension.extension:base
Slice Name	base
Definition	STU3: `ElementDefinition.base`
Short	STU3: base
Comments	Element `ElementDefinition.base` is mapped to FHIR R4B element `ElementDefinition.base` as `Equivalent`. The base information does not carry any information that could not be determined from the path and related profiles, but making this determination requires both that the related profiles are available, and that the algorithm to determine them be available. So they are deformalised into this location for tooling convenience, and to ensure that the base information is available without dependencies.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base` is mapped to FHIR R4B element `ElementDefinition.base` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
208. Extension.extension:base.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
210. Extension.extension:base.extension
Definition	An Extension
Short	Extension
Control	3..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
212. Extension.extension:base.extension:path
Slice Name	path
Definition	STU3: `ElementDefinition.base.path`
Short	STU3: path
Comments	Element `ElementDefinition.base.path` is mapped to FHIR R4B element `ElementDefinition.base.path` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base.path` is mapped to FHIR R4B element `ElementDefinition.base.path` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
214. Extension.extension:base.extension:path.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
216. Extension.extension:base.extension:path.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
218. Extension.extension:base.extension:path.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`path`
220. Extension.extension:base.extension:path.value[x]
Definition	The Path that identifies the base element - this matches the ElementDefinition.path for that element. Across FHIR, there is only one base definition of any element - that is, an element definition on a StructureDefinition without a StructureDefinition.base.
Short	Path that identifies the base element
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
222. Extension.extension:base.extension:min
Slice Name	min
Definition	STU3: `ElementDefinition.base.min`
Short	STU3: min
Comments	Element `ElementDefinition.base.min` is mapped to FHIR R4B element `ElementDefinition.base.min` as `Equivalent`. This is provided for consistency with max, and may affect code generation of mandatory elements of the base resource are generated differently (some reference implementations have done this).
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base.min` is mapped to FHIR R4B element `ElementDefinition.base.min` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
224. Extension.extension:base.extension:min.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
226. Extension.extension:base.extension:min.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
228. Extension.extension:base.extension:min.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`min`
230. Extension.extension:base.extension:min.value[x]
Definition	Minimum cardinality of the base element identified by the path.
Short	Min cardinality of the base element
Comments	This is provided for consistency with max, and may affect code generation of mandatory elements of the base resource are generated differently (some reference implementations have done this).
Control	1..1
Type	unsignedInt
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
232. Extension.extension:base.extension:max
Slice Name	max
Definition	STU3: `ElementDefinition.base.max`
Short	STU3: max
Comments	Element `ElementDefinition.base.max` is mapped to FHIR R4B element `ElementDefinition.base.max` as `Equivalent`. This is provided to code generation, since the serialization representation in JSON differs depending on whether the base element has max > 1. Also, some forms of code generation may differ.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.base.max` is mapped to FHIR R4B element `ElementDefinition.base.max` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
234. Extension.extension:base.extension:max.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
236. Extension.extension:base.extension:max.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
238. Extension.extension:base.extension:max.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`max`
240. Extension.extension:base.extension:max.value[x]
Definition	Maximum cardinality of the base element identified by the path.
Short	Max cardinality of the base element
Comments	This is provided to code generation, since the serialization representation in JSON differs depending on whether the base element has max > 1. Also, some forms of code generation may differ.
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
242. Extension.extension:base.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`base`
244. Extension.extension:base.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
246. Extension.extension:contentReference
Slice Name	contentReference
Definition	STU3: `ElementDefinition.contentReference`
Short	STU3: contentReference
Comments	Element `ElementDefinition.contentReference` is mapped to FHIR R4B element `ElementDefinition.contentReference` as `Equivalent`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.contentReference` is mapped to FHIR R4B element `ElementDefinition.contentReference` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
248. Extension.extension:contentReference.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
250. Extension.extension:contentReference.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
252. Extension.extension:contentReference.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`contentReference`
254. Extension.extension:contentReference.value[x]
Definition	Identifies the identity of an element defined elsewhere in the profile whose content rules should be applied to the current element.
Short	Reference to definition of content for the element
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
256. Extension.extension:type
Slice Name	type
Definition	STU3: `ElementDefinition.type`
Short	STU3: type
Comments	Element `ElementDefinition.type` is mapped to FHIR R4B element `ElementDefinition.type` as `Equivalent`. The Type of the element can be left blank in a differential constraint, in which case the type is inherited from the resource. Abstract types are not permitted to appear as a type when multiple types are listed. (I.e. Abstract types cannot be part of a choice).
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type` is mapped to FHIR R4B element `ElementDefinition.type` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
258. Extension.extension:type.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
260. Extension.extension:type.extension
Definition	An Extension
Short	Extension
Control	1..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
262. Extension.extension:type.extension:code
Slice Name	code
Definition	STU3: `ElementDefinition.type.code`
Short	STU3: code
Comments	Element `ElementDefinition.type.code` is mapped to FHIR R4B element `ElementDefinition.type.code` as `Equivalent`. If the element is a reference to another resource, this element contains "Reference", and the targetProfile element defines what resources can be referenced. The targetProfile may be a reference to the general definition of a resource (e.g. http://hl7.org/fhir/StructureDefinition/Patient). There would be one pair of type/code for each allowed target resource type.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.code` is mapped to FHIR R4B element `ElementDefinition.type.code` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
264. Extension.extension:type.extension:code.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
266. Extension.extension:type.extension:code.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
268. Extension.extension:type.extension:code.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`code`
270. Extension.extension:type.extension:code.value[x]
Definition	URL of Data type or Resource that is a(or the) type used for this element. References are URLs that are relative to http://hl7.org/fhir/StructureDefinition e.g. "string" is a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute URLs are only allowed in logical models.
Short	Data type or Resource (reference to definition)
Comments	If the element is a reference to another resource, this element contains "Reference", and the targetProfile element defines what resources can be referenced. The targetProfile may be a reference to the general definition of a resource (e.g. http://hl7.org/fhir/StructureDefinition/Patient). There would be one pair of type/code for each allowed target resource type.
Control	1..1
Binding	Unless not suitable, these codes SHALL be taken from R3DefinedTypesForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-defined-types-for-R4B\|0.1.0`) Either a resource or a data type, including logical model types
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
272. Extension.extension:type.extension:profile
Slice Name	profile
Definition	STU3: `ElementDefinition.type.profile`
Short	STU3: Profile (StructureDefinition) to apply (or IG)
Comments	Element `ElementDefinition.type.profile` is mapped to FHIR R4B element `ElementDefinition.type.profile` as `SourceIsNarrowerThanTarget`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.profile` is mapped to FHIR R4B element `ElementDefinition.type.profile` as `SourceIsNarrowerThanTarget`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
274. Extension.extension:type.extension:profile.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
276. Extension.extension:type.extension:profile.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
278. Extension.extension:type.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
280. Extension.extension:type.extension:profile.value[x]
Definition	Identifies a profile structure or implementation Guide that SHALL hold for the datatype this element refers to. Can be a local reference - to a contained StructureDefinition, or a reference to another StructureDefinition or Implementation Guide by a canonical URL. When an implementation guide is specified, the resource SHALL conform to at least one profile defined in the implementation guide.
Short	Profile (StructureDefinition) to apply (or IG)
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
282. Extension.extension:type.extension:targetProfile
Slice Name	targetProfile
Definition	STU3: `ElementDefinition.type.targetProfile`
Short	STU3: Profile (StructureDefinition) to apply to reference target (or IG)
Comments	Element `ElementDefinition.type.targetProfile` is mapped to FHIR R4B element `ElementDefinition.type.targetProfile` as `SourceIsNarrowerThanTarget`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.targetProfile` is mapped to FHIR R4B element `ElementDefinition.type.targetProfile` as `SourceIsNarrowerThanTarget`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
284. Extension.extension:type.extension:targetProfile.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
286. Extension.extension:type.extension:targetProfile.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
288. Extension.extension:type.extension:targetProfile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`targetProfile`
290. Extension.extension:type.extension:targetProfile.value[x]
Definition	Identifies a profile structure or implementation Guide that SHALL hold for the target of the reference this element refers to. Can be a local reference - to a contained StructureDefinition, or a reference to another StructureDefinition or Implementation Guide by a canonical URL. When an implementation guide is specified, the resource SHALL conform to at least one profile defined in the implementation guide.
Short	Profile (StructureDefinition) to apply to reference target (or IG)
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
292. Extension.extension:type.extension:aggregation
Slice Name	aggregation
Definition	STU3: `ElementDefinition.type.aggregation`
Short	STU3: aggregation
Comments	Element `ElementDefinition.type.aggregation` is mapped to FHIR R4B element `ElementDefinition.type.aggregation` as `Equivalent`.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.aggregation` is mapped to FHIR R4B element `ElementDefinition.type.aggregation` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
294. Extension.extension:type.extension:aggregation.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
296. Extension.extension:type.extension:aggregation.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
298. Extension.extension:type.extension:aggregation.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`aggregation`
300. Extension.extension:type.extension:aggregation.value[x]
Definition	If the type is a reference to another resource, how the resource is or can be aggregated - is it a contained resource, or a reference, and if the context is a bundle, is it included in the bundle.
Short	contained \| referenced \| bundled - how aggregated
Control	0..1
Binding	The codes SHALL be taken from AggregationMode (required to `http://hl7.org/fhir/ValueSet/resource-aggregation-mode\|4.3.0`) How resource references can be aggregated.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
302. Extension.extension:type.extension:versioning
Slice Name	versioning
Definition	STU3: `ElementDefinition.type.versioning`
Short	STU3: versioning
Comments	Element `ElementDefinition.type.versioning` is mapped to FHIR R4B element `ElementDefinition.type.versioning` as `Equivalent`. The base specification never makes a rule as to which form is allowed, but implementation guides may do this.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.type.versioning` is mapped to FHIR R4B element `ElementDefinition.type.versioning` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
304. Extension.extension:type.extension:versioning.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
306. Extension.extension:type.extension:versioning.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
308. Extension.extension:type.extension:versioning.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versioning`
310. Extension.extension:type.extension:versioning.value[x]
Definition	Whether this reference needs to be version specific or version independent, or whether either can be used.
Short	either \| independent \| specific
Comments	The base specification never makes a rule as to which form is allowed, but implementation guides may do this.
Control	0..1
Binding	The codes SHALL be taken from ReferenceVersionRules (required to `http://hl7.org/fhir/ValueSet/reference-version-rules\|4.3.0`) Whether a reference needs to be version specific or version independent, or whether either can be used
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
312. Extension.extension:type.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`type`
314. Extension.extension:type.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
316. Extension.extension:defaultValue
Slice Name	defaultValue
Definition	STU3: `ElementDefinition.defaultValue[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: defaultValue additional types
Comments	Element `ElementDefinition.defaultValue[x]` is mapped to FHIR R4B element `ElementDefinition.defaultValue[x]` as `RelatedTo`. The mappings for `ElementDefinition.defaultValue[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.defaultValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Default values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. Specifying a default value means that the property can never been unknown - it must always have a value. Further, the default value can never be changed. For these reasons, default values are (and should be) used extremely sparingly.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.defaultValue[x]` is mapped to FHIR R4B element `ElementDefinition.defaultValue[x]` as `RelatedTo`. The mappings for `ElementDefinition.defaultValue[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.defaultValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
318. Extension.extension:defaultValue.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
320. Extension.extension:defaultValue.extension
Definition	An Extension
Short	Extension
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
322. Extension.extension:defaultValue.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
324. Extension.extension:defaultValue.extension:_datatype.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
326. Extension.extension:defaultValue.extension:_datatype.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
328. Extension.extension:defaultValue.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
330. Extension.extension:defaultValue.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
332. Extension.extension:defaultValue.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
334. Extension.extension:defaultValue.extension:versionId.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
336. Extension.extension:defaultValue.extension:versionId.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
338. Extension.extension:defaultValue.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
340. Extension.extension:defaultValue.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
342. Extension.extension:defaultValue.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
344. Extension.extension:defaultValue.extension:lastUpdated.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
346. Extension.extension:defaultValue.extension:lastUpdated.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
348. Extension.extension:defaultValue.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
350. Extension.extension:defaultValue.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
352. Extension.extension:defaultValue.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
354. Extension.extension:defaultValue.extension:profile.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
356. Extension.extension:defaultValue.extension:profile.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
358. Extension.extension:defaultValue.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
360. Extension.extension:defaultValue.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
362. Extension.extension:defaultValue.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
364. Extension.extension:defaultValue.extension:security.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
366. Extension.extension:defaultValue.extension:security.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
368. Extension.extension:defaultValue.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
370. Extension.extension:defaultValue.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
372. Extension.extension:defaultValue.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
374. Extension.extension:defaultValue.extension:tag.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
376. Extension.extension:defaultValue.extension:tag.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
378. Extension.extension:defaultValue.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
380. Extension.extension:defaultValue.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
382. Extension.extension:defaultValue.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`defaultValue`
384. Extension.extension:defaultValue.value[x]
Definition	The value that should be used if there is no value stated in the instance (e.g. 'if not otherwise specified, the abstract is false').
Short	Specified value if missing from instance
Comments	Default values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. Specifying a default value means that the property can never been unknown - it must always have a value. Further, the default value can never be changed. For these reasons, default values are (and should be) used extremely sparingly.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
386. Extension.extension:meaningWhenMissing
Slice Name	meaningWhenMissing
Definition	STU3: `ElementDefinition.meaningWhenMissing`
Short	STU3: meaningWhenMissing
Comments	Element `ElementDefinition.meaningWhenMissing` is mapped to FHIR R4B element `ElementDefinition.meaningWhenMissing` as `Equivalent`. Implicit meanings for missing values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. An implicit meaning for a missing value can never be changed, and specifying one has the consequence that constraining its use in profiles eliminates use cases as possibilities, not merely moving them out of scope.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.meaningWhenMissing` is mapped to FHIR R4B element `ElementDefinition.meaningWhenMissing` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
388. Extension.extension:meaningWhenMissing.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
390. Extension.extension:meaningWhenMissing.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
392. Extension.extension:meaningWhenMissing.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`meaningWhenMissing`
394. Extension.extension:meaningWhenMissing.value[x]
Definition	The Implicit meaning that is to be understood when this element is missing (e.g. 'when this element is missing, the period is ongoing'.
Short	Implicit meaning when this element is missing
Comments	Implicit meanings for missing values can only be specified on a resource, data type, or extension definition, and never in a profile that applies to one of these. An implicit meaning for a missing value can never be changed, and specifying one has the consequence that constraining its use in profiles eliminates use cases as possibilities, not merely moving them out of scope.
Control	0..1
Type	markdown
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
396. Extension.extension:orderMeaning
Slice Name	orderMeaning
Definition	STU3: `ElementDefinition.orderMeaning`
Short	STU3: orderMeaning
Comments	Element `ElementDefinition.orderMeaning` is mapped to FHIR R4B element `ElementDefinition.orderMeaning` as `Equivalent`. This element can only be asserted on repeating elements and can only be introduced when defining resources or data types. It can be further refined profiled elements but if absent in the base type, a profile cannot assert meaning.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.orderMeaning` is mapped to FHIR R4B element `ElementDefinition.orderMeaning` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
398. Extension.extension:orderMeaning.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
400. Extension.extension:orderMeaning.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
402. Extension.extension:orderMeaning.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`orderMeaning`
404. Extension.extension:orderMeaning.value[x]
Definition	If present, indicates that the order of the repeating element has meaning and describes what that meaning is. If absent, it means that the order of the element has no meaning.
Short	What the order of the elements means
Comments	This element can only be asserted on repeating elements and can only be introduced when defining resources or data types. It can be further refined profiled elements but if absent in the base type, a profile cannot assert meaning.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
406. Extension.extension:fixed
Slice Name	fixed
Definition	STU3: `ElementDefinition.fixed[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: fixed additional types
Comments	Element `ElementDefinition.fixed[x]` is mapped to FHIR R4B element `ElementDefinition.fixed[x]` as `RelatedTo`. The mappings for `ElementDefinition.fixed[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.fixed[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. This is not recommended for Coding and CodeableConcept since these often have highly contextual properties such as version or display.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.fixed[x]` is mapped to FHIR R4B element `ElementDefinition.fixed[x]` as `RelatedTo`. The mappings for `ElementDefinition.fixed[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.fixed[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
408. Extension.extension:fixed.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
410. Extension.extension:fixed.extension
Definition	An Extension
Short	Extension
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
412. Extension.extension:fixed.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
414. Extension.extension:fixed.extension:_datatype.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
416. Extension.extension:fixed.extension:_datatype.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
418. Extension.extension:fixed.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
420. Extension.extension:fixed.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
422. Extension.extension:fixed.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
424. Extension.extension:fixed.extension:versionId.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
426. Extension.extension:fixed.extension:versionId.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
428. Extension.extension:fixed.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
430. Extension.extension:fixed.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
432. Extension.extension:fixed.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
434. Extension.extension:fixed.extension:lastUpdated.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
436. Extension.extension:fixed.extension:lastUpdated.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
438. Extension.extension:fixed.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
440. Extension.extension:fixed.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
442. Extension.extension:fixed.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
444. Extension.extension:fixed.extension:profile.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
446. Extension.extension:fixed.extension:profile.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
448. Extension.extension:fixed.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
450. Extension.extension:fixed.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
452. Extension.extension:fixed.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
454. Extension.extension:fixed.extension:security.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
456. Extension.extension:fixed.extension:security.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
458. Extension.extension:fixed.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
460. Extension.extension:fixed.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
462. Extension.extension:fixed.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
464. Extension.extension:fixed.extension:tag.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
466. Extension.extension:fixed.extension:tag.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
468. Extension.extension:fixed.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
470. Extension.extension:fixed.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
472. Extension.extension:fixed.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`fixed`
474. Extension.extension:fixed.value[x]
Definition	Specifies a value that SHALL be exactly the value for this element in the instance. For purposes of comparison, non-significant whitespace is ignored, and all values must be an exact match (case and accent sensitive). Missing elements/attributes must also be missing.
Short	Value must be exactly this
Comments	This is not recommended for Coding and CodeableConcept since these often have highly contextual properties such as version or display.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
476. Extension.extension:pattern
Slice Name	pattern
Definition	STU3: `ElementDefinition.pattern[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: pattern additional types
Comments	Element `ElementDefinition.pattern[x]` is mapped to FHIR R4B element `ElementDefinition.pattern[x]` as `RelatedTo`. The mappings for `ElementDefinition.pattern[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.pattern[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Mostly used for fixing values of CodeableConcept. At present, pattern[x] is not recommended as a basis for slicing while issues related to this are investigated during the STU period.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.pattern[x]` is mapped to FHIR R4B element `ElementDefinition.pattern[x]` as `RelatedTo`. The mappings for `ElementDefinition.pattern[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.pattern[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
478. Extension.extension:pattern.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
480. Extension.extension:pattern.extension
Definition	An Extension
Short	Extension
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
482. Extension.extension:pattern.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
484. Extension.extension:pattern.extension:_datatype.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
486. Extension.extension:pattern.extension:_datatype.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
488. Extension.extension:pattern.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
490. Extension.extension:pattern.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
492. Extension.extension:pattern.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
494. Extension.extension:pattern.extension:versionId.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
496. Extension.extension:pattern.extension:versionId.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
498. Extension.extension:pattern.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
500. Extension.extension:pattern.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
502. Extension.extension:pattern.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
504. Extension.extension:pattern.extension:lastUpdated.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
506. Extension.extension:pattern.extension:lastUpdated.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
508. Extension.extension:pattern.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
510. Extension.extension:pattern.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
512. Extension.extension:pattern.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
514. Extension.extension:pattern.extension:profile.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
516. Extension.extension:pattern.extension:profile.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
518. Extension.extension:pattern.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
520. Extension.extension:pattern.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
522. Extension.extension:pattern.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
524. Extension.extension:pattern.extension:security.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
526. Extension.extension:pattern.extension:security.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
528. Extension.extension:pattern.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
530. Extension.extension:pattern.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
532. Extension.extension:pattern.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
534. Extension.extension:pattern.extension:tag.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
536. Extension.extension:pattern.extension:tag.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
538. Extension.extension:pattern.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
540. Extension.extension:pattern.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
542. Extension.extension:pattern.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`pattern`
544. Extension.extension:pattern.value[x]
Definition	Specifies a value that the value in the instance SHALL follow - that is, any value in the pattern must be found in the instance. Other additional values may be found too. This is effectively constraint by example. The values of elements present in the pattern must match exactly (case-sensitive, accent-sensitive, etc.).
Short	Value must have at least these property values
Comments	Mostly used for fixing values of CodeableConcept. At present, pattern[x] is not recommended as a basis for slicing while issues related to this are investigated during the STU period.
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
546. Extension.extension:example
Slice Name	example
Definition	STU3: `ElementDefinition.example`
Short	STU3: example
Comments	Element `ElementDefinition.example` is mapped to FHIR R4B element `ElementDefinition.example` as `Equivalent`. Examples will most commonly be present for data where it's not implicitly obvious from either the data type or value set what the values might be. (I.e. Example values for dates or quantities would generally be unnecessary.) If the example value is fully populated, the publication tool can generate an instance automatically.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.example` is mapped to FHIR R4B element `ElementDefinition.example` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
548. Extension.extension:example.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
550. Extension.extension:example.extension
Definition	An Extension
Short	Extension
Control	2..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
552. Extension.extension:example.extension:label
Slice Name	label
Definition	STU3: `ElementDefinition.example.label`
Short	STU3: label
Comments	Element `ElementDefinition.example.label` is mapped to FHIR R4B element `ElementDefinition.example.label` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.example.label` is mapped to FHIR R4B element `ElementDefinition.example.label` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
554. Extension.extension:example.extension:label.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
556. Extension.extension:example.extension:label.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
558. Extension.extension:example.extension:label.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`label`
560. Extension.extension:example.extension:label.value[x]
Definition	Describes the purpose of this example amoung the set of examples.
Short	Describes the purpose of this example
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
562. Extension.extension:example.extension:value
Slice Name	value
Definition	STU3: `ElementDefinition.example.value[x]` additional types (Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing, Meta)
Short	STU3: value additional types
Comments	Element `ElementDefinition.example.value[x]` is mapped to FHIR R4B element `ElementDefinition.example.value[x]` as `RelatedTo`. The mappings for `ElementDefinition.example.value[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.example.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition.example`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.example.value[x]` is mapped to FHIR R4B element `ElementDefinition.example.value[x]` as `RelatedTo`. The mappings for `ElementDefinition.example.value[x]` do not cover the following types: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Meta, Period, Range, Ratio, SampledData, Signature, Timing. The target context `ElementDefinition.example.value[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition.example`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
564. Extension.extension:example.extension:value.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
566. Extension.extension:example.extension:value.extension
Definition	An Extension
Short	Extension
Control	1..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
568. Extension.extension:example.extension:value.extension:_datatype
Slice Name	_datatype
Definition	Slice to indicate the presence of a STU3 `Meta` in FHIR R4B
Short	DataType slice for a FHIR STU3 `Meta` value
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
570. Extension.extension:example.extension:value.extension:_datatype.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
572. Extension.extension:example.extension:value.extension:_datatype.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
574. Extension.extension:example.extension:value.extension:_datatype.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/StructureDefinition/_datatype`
576. Extension.extension:example.extension:value.extension:_datatype.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Comments	Must be: Meta
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Fixed Value	`Meta`
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
578. Extension.extension:example.extension:value.extension:versionId
Slice Name	versionId
Definition	STU3: `Meta.versionId`
Short	STU3: versionId
Comments	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`. The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.versionId` is mapped to FHIR R4B element `Meta.versionId` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
580. Extension.extension:example.extension:value.extension:versionId.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
582. Extension.extension:example.extension:value.extension:versionId.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
584. Extension.extension:example.extension:value.extension:versionId.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`versionId`
586. Extension.extension:example.extension:value.extension:versionId.value[x]
Definition	The version specific identifier, as it appears in the version portion of the URL. This values changes when the resource is created, updated, or deleted.
Short	Version specific identifier
Comments	The server assigns this value, and ignores what the client specifies, except in the case that the server is imposing version integrity on updates/deletes.
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
588. Extension.extension:example.extension:value.extension:lastUpdated
Slice Name	lastUpdated
Definition	STU3: `Meta.lastUpdated`
Short	STU3: lastUpdated
Comments	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`. This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.lastUpdated` is mapped to FHIR R4B element `Meta.lastUpdated` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
590. Extension.extension:example.extension:value.extension:lastUpdated.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
592. Extension.extension:example.extension:value.extension:lastUpdated.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
594. Extension.extension:example.extension:value.extension:lastUpdated.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`lastUpdated`
596. Extension.extension:example.extension:value.extension:lastUpdated.value[x]
Definition	When the resource last changed - e.g. when the version changed.
Short	When the resource version last changed
Comments	This value is always populated except when the resource is first being created. The server / resource manager sets this value; what a client provides is irrelevant.
Control	0..1
Type	instant
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
598. Extension.extension:example.extension:value.extension:profile
Slice Name	profile
Definition	STU3: `Meta.profile`
Short	STU3: profile
Comments	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`. It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.profile` is mapped to FHIR R4B element `Meta.profile` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
600. Extension.extension:example.extension:value.extension:profile.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
602. Extension.extension:example.extension:value.extension:profile.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
604. Extension.extension:example.extension:value.extension:profile.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`profile`
606. Extension.extension:example.extension:value.extension:profile.value[x]
Definition	A list of profiles (references to StructureDefinition resources) that this resource claims to conform to. The URL is a reference to StructureDefinition.url.
Short	Profiles this resource claims to conform to
Comments	It is up to the server and/or other infrastructure of policy to determine whether/how these claims are verified and/or updated over time. The list of profile URLs is a set.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
608. Extension.extension:example.extension:value.extension:security
Slice Name	security
Definition	STU3: `Meta.security`
Short	STU3: security
Comments	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`. The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.security` is mapped to FHIR R4B element `Meta.security` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
610. Extension.extension:example.extension:value.extension:security.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
612. Extension.extension:example.extension:value.extension:security.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
614. Extension.extension:example.extension:value.extension:security.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`security`
616. Extension.extension:example.extension:value.extension:security.value[x]
Definition	Security labels applied to this resource. These tags connect specific resources to the overall security policy and infrastructure.
Short	Security Labels applied to this resource
Comments	The security labels can be updated without changing the stated version of the resource The list of security labels is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	Unless not suitable, these codes SHALL be taken from R3SecurityLabelsForR4B (0.1.0) (extensible to `http://hl7.org/fhir/uv/xver/ValueSet/R3-security-labels-for-R4B\|0.1.0`) Security Labels from the Healthcare Privacy and Security Classification System.
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
618. Extension.extension:example.extension:value.extension:tag
Slice Name	tag
Definition	STU3: `Meta.tag`
Short	STU3: tag
Comments	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`. The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `Meta.tag` is mapped to FHIR R4B element `Meta.tag` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
620. Extension.extension:example.extension:value.extension:tag.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
622. Extension.extension:example.extension:value.extension:tag.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
624. Extension.extension:example.extension:value.extension:tag.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`tag`
626. Extension.extension:example.extension:value.extension:tag.value[x]
Definition	Tags applied to this resource. Tags are intended to be used to identify and relate resources to process and workflow, and applications are not required to consider the tags when interpreting the meaning of a resource.
Short	Tags applied to this resource
Comments	The tags can be updated without changing the stated version of the resource. The list of tags is a set. Uniqueness is based the system/code, and version and display are ignored.
Control	0..1
Binding	For example codes, see CommonTags (example to `http://hl7.org/fhir/ValueSet/common-tags\|4.3.0`) Codes that represent various types of tags, commonly workflow-related; e.g. "Needs review by Dr. Jones"
Type	Coding
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
628. Extension.extension:example.extension:value.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`value`
630. Extension.extension:example.extension:value.value[x]
Definition	The actual value for the element, which must be one of the types allowed for this element.
Short	Value of Example (one of allowed types)
Control	0..1
Type	Choice of: Address, Annotation, Attachment, ContactPoint, HumanName, Identifier, Period, Range, Ratio, SampledData, Signature, Timing
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
632. Extension.extension:example.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`example`
634. Extension.extension:example.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
636. Extension.extension:minValue
Slice Name	minValue
Definition	STU3: `ElementDefinition.minValue[x]`
Short	STU3: minValue
Comments	Element `ElementDefinition.minValue[x]` is mapped to FHIR R4B element `ElementDefinition.minValue[x]` as `RelatedTo`. The target context `ElementDefinition.minValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Except for date/date/instant, the type of the minValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of minValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is subtracted from the current clock to determine the minimum allowable value. A minimum value for a Quantity is interpreted as an canonical minimum - e.g. you cannot provide 100mg if the minimum value is 10g.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.minValue[x]` is mapped to FHIR R4B element `ElementDefinition.minValue[x]` as `RelatedTo`. The target context `ElementDefinition.minValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
638. Extension.extension:minValue.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
640. Extension.extension:minValue.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
642. Extension.extension:minValue.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`minValue`
644. Extension.extension:minValue.value[x]
Definition	The minimum allowed value for the element. The value is inclusive. This is allowed for the types date, dateTime, instant, time, decimal, integer, and Quantity.
Short	Minimum Allowed Value (for some types)
Comments	Except for date/date/instant, the type of the minValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of minValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is subtracted from the current clock to determine the minimum allowable value. A minimum value for a Quantity is interpreted as an canonical minimum - e.g. you cannot provide 100mg if the minimum value is 10g.
Control	0..1
Type	Choice of: date, dateTime, instant, time, decimal, integer, positiveInt, unsignedInt, Quantity
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
646. Extension.extension:maxValue
Slice Name	maxValue
Definition	STU3: `ElementDefinition.maxValue[x]`
Short	STU3: maxValue
Comments	Element `ElementDefinition.maxValue[x]` is mapped to FHIR R4B element `ElementDefinition.maxValue[x]` as `RelatedTo`. The target context `ElementDefinition.maxValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`. Except for date/date/instant, the type of the maxValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of maxValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is added to the current clock to determine the maximum allowable value. A maximum value for a Quantity is interpreted as an canonical maximum - e.g. you cannot provide 10g if the maximum value is 50mg.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.maxValue[x]` is mapped to FHIR R4B element `ElementDefinition.maxValue[x]` as `RelatedTo`. The target context `ElementDefinition.maxValue[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `ElementDefinition`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
648. Extension.extension:maxValue.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
650. Extension.extension:maxValue.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
652. Extension.extension:maxValue.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`maxValue`
654. Extension.extension:maxValue.value[x]
Definition	The maximum allowed value for the element. The value is inclusive. This is allowed for the types date, dateTime, instant, time, decimal, integer, and Quantity.
Short	Maximum Allowed Value (for some types)
Comments	Except for date/date/instant, the type of the maxValue[x] SHALL be the same as the specified type of the element. For the date/dateTime/instant values, the type of maxValue[x] SHALL be either the same, or a a Duration which specifies a relative time limit to the current time. The duration value is positive, and is added to the current clock to determine the maximum allowable value. A maximum value for a Quantity is interpreted as an canonical maximum - e.g. you cannot provide 10g if the maximum value is 50mg.
Control	0..1
Type	Choice of: date, dateTime, instant, time, decimal, integer, positiveInt, unsignedInt, Quantity
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
656. Extension.extension:maxLength
Slice Name	maxLength
Definition	STU3: `ElementDefinition.maxLength`
Short	STU3: maxLength
Comments	Element `ElementDefinition.maxLength` is mapped to FHIR R4B element `ElementDefinition.maxLength` as `Equivalent`. Receivers are not required to reject instances that exceed the maximum length. The full length could be stored. In some cases, data might be truncated, though truncation should be undertaken with care and an understanding of the consequences of doing so. If not specified, there is no conformance expectation for length support.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.maxLength` is mapped to FHIR R4B element `ElementDefinition.maxLength` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
658. Extension.extension:maxLength.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
660. Extension.extension:maxLength.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
662. Extension.extension:maxLength.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`maxLength`
664. Extension.extension:maxLength.value[x]
Definition	Indicates the maximum length in characters that is permitted to be present in conformant instances and which is expected to be supported by conformant consumers that support the element.
Short	Max length for strings
Comments	Receivers are not required to reject instances that exceed the maximum length. The full length could be stored. In some cases, data might be truncated, though truncation should be undertaken with care and an understanding of the consequences of doing so. If not specified, there is no conformance expectation for length support.
Control	0..1
Type	integer
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
666. Extension.extension:condition
Slice Name	condition
Definition	STU3: `ElementDefinition.condition`
Short	STU3: condition
Comments	Element `ElementDefinition.condition` is mapped to FHIR R4B element `ElementDefinition.condition` as `Equivalent`.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.condition` is mapped to FHIR R4B element `ElementDefinition.condition` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
668. Extension.extension:condition.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
670. Extension.extension:condition.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
672. Extension.extension:condition.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`condition`
674. Extension.extension:condition.value[x]
Definition	A reference to an invariant that may make additional statements about the cardinality or value in the instance.
Short	Reference to invariant about presence
Control	0..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
676. Extension.extension:constraint
Slice Name	constraint
Definition	STU3: `ElementDefinition.constraint`
Short	STU3: constraint
Comments	Element `ElementDefinition.constraint` is mapped to FHIR R4B element `ElementDefinition.constraint` as `Equivalent`. Constraints should be declared on the "context" element - the lowest element in the hierarchy that is common to all nodes referenced by the constraint.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint` is mapped to FHIR R4B element `ElementDefinition.constraint` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
678. Extension.extension:constraint.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
680. Extension.extension:constraint.extension
Definition	An Extension
Short	Extension
Control	4..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
682. Extension.extension:constraint.extension:key
Slice Name	key
Definition	STU3: `ElementDefinition.constraint.key`
Short	STU3: key
Comments	Element `ElementDefinition.constraint.key` is mapped to FHIR R4B element `ElementDefinition.constraint.key` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.key` is mapped to FHIR R4B element `ElementDefinition.constraint.key` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
684. Extension.extension:constraint.extension:key.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
686. Extension.extension:constraint.extension:key.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
688. Extension.extension:constraint.extension:key.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`key`
690. Extension.extension:constraint.extension:key.value[x]
Definition	Allows identification of which elements have their cardinalities impacted by the constraint. Will not be referenced for constraints that do not affect cardinality.
Short	Target of 'condition' reference above
Control	1..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
692. Extension.extension:constraint.extension:requirements
Slice Name	requirements
Definition	STU3: `ElementDefinition.constraint.requirements`
Short	STU3: requirements
Comments	Element `ElementDefinition.constraint.requirements` is mapped to FHIR R4B element `ElementDefinition.constraint.requirements` as `Equivalent`. To be used if the reason for the constraint may not be intuitive to all implementers.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.requirements` is mapped to FHIR R4B element `ElementDefinition.constraint.requirements` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
694. Extension.extension:constraint.extension:requirements.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
696. Extension.extension:constraint.extension:requirements.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
698. Extension.extension:constraint.extension:requirements.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`requirements`
700. Extension.extension:constraint.extension:requirements.value[x]
Definition	Description of why this constraint is necessary or appropriate.
Short	Why this constraint is necessary or appropriate
Comments	To be used if the reason for the constraint may not be intuitive to all implementers.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
702. Extension.extension:constraint.extension:severity
Slice Name	severity
Definition	STU3: `ElementDefinition.constraint.severity`
Short	STU3: severity
Comments	Element `ElementDefinition.constraint.severity` is mapped to FHIR R4B element `ElementDefinition.constraint.severity` as `Equivalent`. This allows constraints to be asserted as "shall" (error) and "should" (warning).
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.severity` is mapped to FHIR R4B element `ElementDefinition.constraint.severity` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
704. Extension.extension:constraint.extension:severity.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
706. Extension.extension:constraint.extension:severity.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
708. Extension.extension:constraint.extension:severity.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`severity`
710. Extension.extension:constraint.extension:severity.value[x]
Definition	Identifies the impact constraint violation has on the conformance of the instance.
Short	error \| warning
Comments	This allows constraints to be asserted as "shall" (error) and "should" (warning).
Control	1..1
Binding	The codes SHALL be taken from ConstraintSeverity (required to `http://hl7.org/fhir/ValueSet/constraint-severity\|4.3.0`) SHALL applications comply with this constraint?
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
712. Extension.extension:constraint.extension:human
Slice Name	human
Definition	STU3: `ElementDefinition.constraint.human`
Short	STU3: human
Comments	Element `ElementDefinition.constraint.human` is mapped to FHIR R4B element `ElementDefinition.constraint.human` as `Equivalent`. Should be expressed in business terms as much as possible.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.human` is mapped to FHIR R4B element `ElementDefinition.constraint.human` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
714. Extension.extension:constraint.extension:human.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
716. Extension.extension:constraint.extension:human.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
718. Extension.extension:constraint.extension:human.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`human`
720. Extension.extension:constraint.extension:human.value[x]
Definition	Text that can be used to describe the constraint in messages identifying that the constraint has been violated.
Short	Human description of constraint
Comments	Should be expressed in business terms as much as possible.
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
722. Extension.extension:constraint.extension:expression
Slice Name	expression
Definition	STU3: `ElementDefinition.constraint.expression`
Short	STU3: expression
Comments	Element `ElementDefinition.constraint.expression` is mapped to FHIR R4B element `ElementDefinition.constraint.expression` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Used by validation tooling tests of the validity of the resource. Element `ElementDefinition.constraint.expression` is mapped to FHIR R4B element `ElementDefinition.constraint.expression` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
724. Extension.extension:constraint.extension:expression.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
726. Extension.extension:constraint.extension:expression.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
728. Extension.extension:constraint.extension:expression.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`expression`
730. Extension.extension:constraint.extension:expression.value[x]
Definition	A FHIRPath expression of constraint that can be executed to see if this constraint is met.
Short	FHIRPath expression of constraint
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
732. Extension.extension:constraint.extension:xpath
Slice Name	xpath
Definition	STU3: `ElementDefinition.constraint.xpath`
Short	STU3: xpath
Comments	Element `ElementDefinition.constraint.xpath` is mapped to FHIR R4B element `ElementDefinition.constraint.xpath` as `Equivalent`. Elements SHALL use "f" as the namespace prefix for the FHIR namespace, and "x" for the xhtml namespace, and SHALL NOT use any other prefixes. Note: we are considering deprecating the xpath element. Implementer feedback is welcome.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Used in Schematron tests of the validity of the resource. Element `ElementDefinition.constraint.xpath` is mapped to FHIR R4B element `ElementDefinition.constraint.xpath` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
734. Extension.extension:constraint.extension:xpath.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
736. Extension.extension:constraint.extension:xpath.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
738. Extension.extension:constraint.extension:xpath.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`xpath`
740. Extension.extension:constraint.extension:xpath.value[x]
Definition	An XPath expression of constraint that can be executed to see if this constraint is met.
Short	XPath expression of constraint
Comments	Elements SHALL use "f" as the namespace prefix for the FHIR namespace, and "x" for the xhtml namespace, and SHALL NOT use any other prefixes. Note: we are considering deprecating the xpath element. Implementer feedback is welcome.
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
742. Extension.extension:constraint.extension:source
Slice Name	source
Definition	STU3: `ElementDefinition.constraint.source`
Short	STU3: source
Comments	Element `ElementDefinition.constraint.source` is mapped to FHIR R4B element `ElementDefinition.constraint.source` as `Equivalent`. This is used when, e.g. rendering, where it is not useful to present inherited constraints when rendering the snapshot.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.constraint.source` is mapped to FHIR R4B element `ElementDefinition.constraint.source` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
744. Extension.extension:constraint.extension:source.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
746. Extension.extension:constraint.extension:source.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
748. Extension.extension:constraint.extension:source.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`source`
750. Extension.extension:constraint.extension:source.value[x]
Definition	A reference to the original source of the constraint, for traceability purposes.
Short	Reference to original source of constraint
Comments	This is used when, e.g. rendering, where it is not useful to present inherited constraints when rendering the snapshot.
Control	0..1
Type	uri
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
752. Extension.extension:constraint.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`constraint`
754. Extension.extension:constraint.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
756. Extension.extension:mustSupport
Slice Name	mustSupport
Definition	STU3: `ElementDefinition.mustSupport`
Short	STU3: If the element must supported
Comments	Element `ElementDefinition.mustSupport` is mapped to FHIR R4B element `ElementDefinition.mustSupport` as `Equivalent`. "Something useful" is context dependent and impossible to describe in the base FHIR specification. For this reason, tue mustSupport flag is never set to true by the FHIR specification itself - it is only set to true in profiles. This is done in Resource Profiles, where the profile labels an element as mustSupport=true. When a profile does this, it SHALL also make clear exactly what kind of "support" is required, as this can mean many things. Note that an element that has the property IsModifier is not necessarily a "key" element (e.g. one of the important elements to make use of the resource), nor is it automatically mustSupport - however both of these things are more likely to be true for IsModifier elements than for other elements.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allows a profile to set expectations for system capabilities beyond merely respecting cardinality constraints. Element `ElementDefinition.mustSupport` is mapped to FHIR R4B element `ElementDefinition.mustSupport` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
758. Extension.extension:mustSupport.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
760. Extension.extension:mustSupport.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
762. Extension.extension:mustSupport.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`mustSupport`
764. Extension.extension:mustSupport.value[x]
Definition	If true, implementations that produce or consume resources SHALL provide "support" for the element in some meaningful way. If false, the element may be ignored and not supported.
Short	If the element must supported
Comments	"Something useful" is context dependent and impossible to describe in the base FHIR specification. For this reason, tue mustSupport flag is never set to true by the FHIR specification itself - it is only set to true in profiles. This is done in Resource Profiles, where the profile labels an element as mustSupport=true. When a profile does this, it SHALL also make clear exactly what kind of "support" is required, as this can mean many things. Note that an element that has the property IsModifier is not necessarily a "key" element (e.g. one of the important elements to make use of the resource), nor is it automatically mustSupport - however both of these things are more likely to be true for IsModifier elements than for other elements.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
766. Extension.extension:isModifier
Slice Name	isModifier
Definition	STU3: `ElementDefinition.isModifier`
Short	STU3: isModifier
Comments	Element `ElementDefinition.isModifier` is mapped to FHIR R4B element `ElementDefinition.isModifier` as `Equivalent`. Only the definition of an element can set IsModifier true - either the specification itself or where an extension is originally defined. Once set, it cannot be changed in derived profiles. An element/extension that has isModifier=true SHOULD also have a minimum cardinality of 1, so that there is no lack of clarity about what to do if it is missing. If it can be missing, the definition SHALL make the meaning of a missing element clear.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allows elements to be introduced into a specification that can't safely be ignored by applications that don't recognize them. Element `ElementDefinition.isModifier` is mapped to FHIR R4B element `ElementDefinition.isModifier` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
768. Extension.extension:isModifier.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
770. Extension.extension:isModifier.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
772. Extension.extension:isModifier.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`isModifier`
774. Extension.extension:isModifier.value[x]
Definition	If true, the value of this element affects the interpretation of the element or resource that contains it, and the value of the element cannot be ignored. Typically, this is used for status, negation and qualification codes. The effect of this is that the element cannot be ignored by systems: they SHALL either recognize the element and process it, and/or a pre-determination has been made that it is not relevant to their particular system.
Short	If this modifies the meaning of other elements
Comments	Only the definition of an element can set IsModifier true - either the specification itself or where an extension is originally defined. Once set, it cannot be changed in derived profiles. An element/extension that has isModifier=true SHOULD also have a minimum cardinality of 1, so that there is no lack of clarity about what to do if it is missing. If it can be missing, the definition SHALL make the meaning of a missing element clear.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
776. Extension.extension:isSummary
Slice Name	isSummary
Definition	STU3: `ElementDefinition.isSummary`
Short	STU3: isSummary
Comments	Element `ElementDefinition.isSummary` is mapped to FHIR R4B element `ElementDefinition.isSummary` as `Equivalent`. Some resources include a set of simple metadata, and some very large data. This element is used to reduce the quantity of data returned in searches. Note that servers may pre-cache summarized resources for optimal performance, so servers may not support per-profile use of the isSummary flag. When a request is made with _summary=true, serailisers only include elements marked as 'isSummary = true'. Other than Attachment.data, all data type properties are included in the summary form. Modifier elements or elements with minimum cardinality = 1 must be marked as summary elements.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Allow clients to search through large resources quickly. Element `ElementDefinition.isSummary` is mapped to FHIR R4B element `ElementDefinition.isSummary` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
778. Extension.extension:isSummary.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
780. Extension.extension:isSummary.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
782. Extension.extension:isSummary.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`isSummary`
784. Extension.extension:isSummary.value[x]
Definition	Whether the element should be included if a client requests a search with the parameter _summary=true.
Short	Include when _summary = true?
Comments	Some resources include a set of simple metadata, and some very large data. This element is used to reduce the quantity of data returned in searches. Note that servers may pre-cache summarized resources for optimal performance, so servers may not support per-profile use of the isSummary flag. When a request is made with _summary=true, serailisers only include elements marked as 'isSummary = true'. Other than Attachment.data, all data type properties are included in the summary form. Modifier elements or elements with minimum cardinality = 1 must be marked as summary elements.
Control	0..1
Type	boolean
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
786. Extension.extension:binding
Slice Name	binding
Definition	STU3: `ElementDefinition.binding`
Short	STU3: binding
Comments	Element `ElementDefinition.binding` is mapped to FHIR R4B element `ElementDefinition.binding` as `Equivalent`. For a CodeableConcept, when no codes are allowed - only text, use a binding of strength "required" with a description explaining that no coded values are allowed and what sort of information to put in the "text" element.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding` is mapped to FHIR R4B element `ElementDefinition.binding` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
788. Extension.extension:binding.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
790. Extension.extension:binding.extension
Definition	An Extension
Short	Extension
Control	1..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
792. Extension.extension:binding.extension:strength
Slice Name	strength
Definition	STU3: `ElementDefinition.binding.strength`
Short	STU3: strength
Comments	Element `ElementDefinition.binding.strength` is mapped to FHIR R4B element `ElementDefinition.binding.strength` as `Equivalent`. For further discussion, see Using Terminologies.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding.strength` is mapped to FHIR R4B element `ElementDefinition.binding.strength` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
794. Extension.extension:binding.extension:strength.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
796. Extension.extension:binding.extension:strength.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
798. Extension.extension:binding.extension:strength.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`strength`
800. Extension.extension:binding.extension:strength.value[x]
Definition	Indicates the degree of conformance expectations associated with this binding - that is, the degree to which the provided value set must be adhered to in the instances.
Short	required \| extensible \| preferred \| example
Comments	For further discussion, see Using Terminologies.
Control	1..1
Binding	The codes SHALL be taken from BindingStrength (required to `http://hl7.org/fhir/ValueSet/binding-strength\|4.3.0`) Indication of the degree of conformance expectations associated with a binding.
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
802. Extension.extension:binding.extension:description
Slice Name	description
Definition	STU3: `ElementDefinition.binding.description`
Short	STU3: description
Comments	Element `ElementDefinition.binding.description` is mapped to FHIR R4B element `ElementDefinition.binding.description` as `Equivalent`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding.description` is mapped to FHIR R4B element `ElementDefinition.binding.description` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
804. Extension.extension:binding.extension:description.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
806. Extension.extension:binding.extension:description.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
808. Extension.extension:binding.extension:description.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`description`
810. Extension.extension:binding.extension:description.value[x]
Definition	Describes the intended use of this particular set of codes.
Short	Human explanation of the value set
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
812. Extension.extension:binding.extension:valueSet
Slice Name	valueSet
Definition	STU3: `ElementDefinition.binding.valueSet[x]` additional types (Reference(http://hl7.org/fhir/StructureDefinition/ValueSet)) additional types from child elements (display, identifier, reference)
Short	STU3: Source of value set additional types
Comments	Element `ElementDefinition.binding.valueSet[x]` is mapped to FHIR R4B element `ElementDefinition.binding.valueSet` as `SourceIsBroaderThanTarget`. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types: Reference. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types based on type expansion: display, identifier, reference. For value sets with a referenceResource, the display can contain the value set description. The reference may be version-specific or not.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.binding.valueSet[x]` is mapped to FHIR R4B element `ElementDefinition.binding.valueSet` as `SourceIsBroaderThanTarget`. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types: Reference. The mappings for `ElementDefinition.binding.valueSet[x]` do not cover the following types based on type expansion: display, identifier, reference.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
814. Extension.extension:binding.extension:valueSet.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
816. Extension.extension:binding.extension:valueSet.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
818. Extension.extension:binding.extension:valueSet.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`valueSet`
820. Extension.extension:binding.extension:valueSet.value[x]
Definition	Points to the value set or external definition (e.g. implicit value set) that identifies the set of codes to be used. If the binding refers to an explicit value set - the normal case - then use a Reference(ValueSet) preferably containing the canonical URL for the value set. If the reference is to an implicit value set - usually, an IETF RFC that defines a grammar, such as mime types - then use a uri.
Short	Source of value set
Comments	For value sets with a referenceResource, the display can contain the value set description. The reference may be version-specific or not.
Control	0..1
Type	Reference(Cross-version Profile for STU3.ValueSet for use in FHIR R4B, ValueSet)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
822. Extension.extension:binding.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`binding`
824. Extension.extension:binding.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
826. Extension.extension:mapping
Slice Name	mapping
Definition	STU3: `ElementDefinition.mapping`
Short	STU3: mapping
Comments	Element `ElementDefinition.mapping` is mapped to FHIR R4B element `ElementDefinition.mapping` as `Equivalent`. Mappings are not necessarily specific enough for safe translation.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Requirements	Provides guidance to implementers familiar with or converting content from other specifications. Element `ElementDefinition.mapping` is mapped to FHIR R4B element `ElementDefinition.mapping` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
828. Extension.extension:mapping.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
830. Extension.extension:mapping.extension
Definition	An Extension
Short	Extension
Control	2..*
Type	Extension
Is Modifier	false
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
832. Extension.extension:mapping.extension:identity
Slice Name	identity
Definition	STU3: `ElementDefinition.mapping.identity`
Short	STU3: identity
Comments	Element `ElementDefinition.mapping.identity` is mapped to FHIR R4B element `ElementDefinition.mapping.identity` as `Equivalent`.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.identity` is mapped to FHIR R4B element `ElementDefinition.mapping.identity` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
834. Extension.extension:mapping.extension:identity.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
836. Extension.extension:mapping.extension:identity.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
838. Extension.extension:mapping.extension:identity.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`identity`
840. Extension.extension:mapping.extension:identity.value[x]
Definition	An internal reference to the definition of a mapping.
Short	Reference to mapping declaration
Control	1..1
Type	id
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
842. Extension.extension:mapping.extension:language
Slice Name	language
Definition	STU3: `ElementDefinition.mapping.language`
Short	STU3: language
Comments	Element `ElementDefinition.mapping.language` is mapped to FHIR R4B element `ElementDefinition.mapping.language` as `Equivalent`. If omitted, then there can be no expectation of computational interpretation of the mapping.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.language` is mapped to FHIR R4B element `ElementDefinition.mapping.language` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
844. Extension.extension:mapping.extension:language.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
846. Extension.extension:mapping.extension:language.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
848. Extension.extension:mapping.extension:language.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`language`
850. Extension.extension:mapping.extension:language.value[x]
Definition	Identifies the computable language in which mapping.map is expressed.
Short	Computable language of mapping
Comments	If omitted, then there can be no expectation of computational interpretation of the mapping.
Control	0..1
Type	code
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
852. Extension.extension:mapping.extension:map
Slice Name	map
Definition	STU3: `ElementDefinition.mapping.map`
Short	STU3: map
Comments	Element `ElementDefinition.mapping.map` is mapped to FHIR R4B element `ElementDefinition.mapping.map` as `Equivalent`. For most mappings, the syntax is undefined. Syntax will be provided for mappings to the RIM. Multiple mappings may be possible and may include constraints on other resource elements that identify when a particular mapping applies.
Control	1..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.map` is mapped to FHIR R4B element `ElementDefinition.mapping.map` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
854. Extension.extension:mapping.extension:map.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
856. Extension.extension:mapping.extension:map.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
858. Extension.extension:mapping.extension:map.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`map`
860. Extension.extension:mapping.extension:map.value[x]
Definition	Expresses what part of the target specification corresponds to this element.
Short	Details of the mapping
Comments	For most mappings, the syntax is undefined. Syntax will be provided for mappings to the RIM. Multiple mappings may be possible and may include constraints on other resource elements that identify when a particular mapping applies.
Control	1..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
862. Extension.extension:mapping.extension:comment
Slice Name	comment
Definition	STU3: `ElementDefinition.mapping.comment`
Short	STU3: comment
Comments	Element `ElementDefinition.mapping.comment` is mapped to FHIR R4B element `ElementDefinition.mapping.comment` as `Equivalent`.
Control	0..1
Type	Extension
Is Modifier	false
Summary	false
Requirements	Element `ElementDefinition.mapping.comment` is mapped to FHIR R4B element `ElementDefinition.mapping.comment` as `Equivalent`.
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
864. Extension.extension:mapping.extension:comment.id
Definition	Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short	Unique id for inter-element referencing
Control	0..1
Type	id
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
866. Extension.extension:mapping.extension:comment.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short	Additional content defined by implementations
Comments	There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control	0..*
Type	Extension
Is Modifier	false
Summary	false
Alternate Names	extensions, user content
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing	This element introduces a set of slices on `Extension.extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
868. Extension.extension:mapping.extension:comment.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`comment`
870. Extension.extension:mapping.extension:comment.value[x]
Definition	Comments that provide information about the mapping or its use.
Short	Comments about the mapping or its use
Control	0..1
Type	string
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
872. Extension.extension:mapping.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`mapping`
874. Extension.extension:mapping.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
876. Extension.url
Definition	Source of the definition for the extension code - a logical name or a URL.
Short	identifies the meaning of the extension
Comments	The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control	1..1
Type	uri
Is Modifier	false
XML Format	In the XML format, this property is represented as an attribute.
Summary	false
Fixed Value	`http://hl7.org/fhir/3.0/StructureDefinition/extension-DataElement.element`
878. Extension.value[x]
Definition	Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, CodeableReference, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, RatioRange, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage
Is Modifier	false
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
Summary	false
Invariants	ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)