ExtensionSubstanceReferenceInformation_Gene - Definitions - Extensions for Using Data Elements from FHIR R5 in FHIR STU3 v0.1.0

Extensions for Using Data Elements from FHIR R5 in FHIR STU3 - Downloaded Version null See the Directory of published versions

Extension: ExtensionSubstanceReferenceInformation_Gene - Detailed Descriptions

Page standards status: Trial-use

Maturity Level: 0

Definitions for the ext-R5-SubstanceReferenceInformation.gene 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	R5: `SubstanceReferenceInformation.gene` (new:BackboneElement) Optional Extension Element - found in all resources.
Short	R5: Todo (new)Optional Extensions Element
Comments	Element `SubstanceReferenceInformation.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..* 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 (`hasValue() \| (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() \| (children().count() > id.count())) 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. In order 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 is allowed to 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
Alternate Names	extensions, user content
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:geneSequenceOrigin
Slice Name	geneSequenceOrigin
Definition	R5: `SubstanceReferenceInformation.gene.geneSequenceOrigin` (new:CodeableConcept)
Short	R5: Todo (new)Additional Content defined by implementations
Comments	Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..1*
Type	Extension
Requirements	Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
6. Extension.extension:geneSequenceOrigin.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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`geneSequenceOrigin`
8. Extension.extension:geneSequenceOrigin.value[x]
Definition	Todo. Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).
Short	TodoValue of extension
Control	0..1
Type	CodeableConcept, date, dateTime, Meta, code, string, Address, Attachment, integer, oid, Count, instant, ContactPoint, HumanName, Money, Identifier, Coding, markdown, SampledData, Ratio, id, positiveInt, Age, Distance, Reference, Period, Quantity, Duration, Range, uri, Annotation, boolean, base64Binary, Signature, unsignedInt, time, Timing, decimal
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
10. Extension.extension:gene
Slice Name	gene
Definition	R5: `SubstanceReferenceInformation.gene.gene` (new:CodeableConcept)
Short	R5: Todo (new)Additional Content defined by implementations
Comments	Element `SubstanceReferenceInformation.gene.gene` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..1*
Type	Extension
Requirements	Element `SubstanceReferenceInformation.gene.gene` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
12. Extension.extension:gene.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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`gene`
14. Extension.extension:gene.value[x]
Definition	Todo. Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).
Short	TodoValue of extension
Control	0..1
Type	CodeableConcept, date, dateTime, Meta, code, string, Address, Attachment, integer, oid, Count, instant, ContactPoint, HumanName, Money, Identifier, Coding, markdown, SampledData, Ratio, id, positiveInt, Age, Distance, Reference, Period, Quantity, Duration, Range, uri, Annotation, boolean, base64Binary, Signature, unsignedInt, time, Timing, decimal
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
16. Extension.extension:source
Slice Name	source
Definition	R5: `SubstanceReferenceInformation.gene.source` (new:Reference(DocumentReference))
Short	R5: Todo (new)Additional Content defined by implementations
Comments	Element `SubstanceReferenceInformation.gene.source` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.source` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..*
Type	Extension
Requirements	Element `SubstanceReferenceInformation.gene.source` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.source` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
18. Extension.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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`source`
20. Extension.extension:source.value[x]
Definition	Todo. Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).
Short	TodoValue of extension
Control	0..1
Type	Reference(Cross-version Profile for R5.DocumentReference for use in FHIR STU3, Media), date, dateTime, Meta, code, string, Address, Attachment, integer, oid, Count, instant, ContactPoint, HumanName, Money, Identifier, Coding, markdown, SampledData, Ratio, id, positiveInt, Age, Distance, Period, Quantity, Duration, Range, uri, Annotation, boolean, base64Binary, Signature, unsignedInt, time, Timing, decimal, CodeableConcept
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
22. 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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`http://hl7.org/fhir/5.0/StructureDefinition/extension-SubstanceReferenceInformation.gene`
24. Extension.value[x]
Definition	Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).
Short	Value of extension
Control	0..01
Type	Choice of: base64Binary, boolean, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, Meta
Primitive Value	This primitive element may be present, or absent, or replaced by an extension

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

0. Extension
Definition	R5: `SubstanceReferenceInformation.gene` (new:BackboneElement)
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..*
Is Modifier	false
2. Extension.extension
Control	0..*
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:geneSequenceOrigin
Slice Name	geneSequenceOrigin
Definition	R5: `SubstanceReferenceInformation.gene.geneSequenceOrigin` (new:CodeableConcept)
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..1
Requirements	Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
6. Extension.extension:geneSequenceOrigin.url
Control	1..1
Fixed Value	`geneSequenceOrigin`
8. Extension.extension:geneSequenceOrigin.value[x]
Definition	Todo.
Short	Todo
Control	0..1
Type	CodeableConcept
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
10. Extension.extension:gene
Slice Name	gene
Definition	R5: `SubstanceReferenceInformation.gene.gene` (new:CodeableConcept)
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene.gene` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..1
Requirements	Element `SubstanceReferenceInformation.gene.gene` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
12. Extension.extension:gene.url
Control	1..1
Fixed Value	`gene`
14. Extension.extension:gene.value[x]
Definition	Todo.
Short	Todo
Control	0..1
Type	CodeableConcept
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
16. Extension.extension:source
Slice Name	source
Definition	R5: `SubstanceReferenceInformation.gene.source` (new:Reference(DocumentReference))
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene.source` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.source` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..*
Requirements	Element `SubstanceReferenceInformation.gene.source` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.source` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
18. Extension.extension:source.url
Control	1..1
Fixed Value	`source`
20. Extension.extension:source.value[x]
Definition	Todo.
Short	Todo
Control	0..1
Type	Reference(Cross-version Profile for R5.DocumentReference for use in FHIR STU3, Media)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
22. Extension.url
Control	1..1
Fixed Value	`http://hl7.org/fhir/5.0/StructureDefinition/extension-SubstanceReferenceInformation.gene`
24. Extension.value[x]
Control	0..0

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

0. Extension
Definition	R5: `SubstanceReferenceInformation.gene` (new:BackboneElement)
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..* 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 (`hasValue() \| (children().count() > id.count())`) 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	xml:id (or equivalent in JSON)
Control	0..1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
4. Extension.extension
Definition	An Extension
Short	Extension
Control	0..*
Type	Extension
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:geneSequenceOrigin
Slice Name	geneSequenceOrigin
Definition	R5: `SubstanceReferenceInformation.gene.geneSequenceOrigin` (new:CodeableConcept)
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..1
Type	Extension
Requirements	Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.geneSequenceOrigin` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
8. Extension.extension:geneSequenceOrigin.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	xml:id (or equivalent in JSON)
Control	0..1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
10. Extension.extension:geneSequenceOrigin.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to 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
Alternate Names	extensions, user content
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:geneSequenceOrigin.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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`geneSequenceOrigin`
14. Extension.extension:geneSequenceOrigin.value[x]
Definition	Todo.
Short	Todo
Control	0..1
Type	CodeableConcept
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
16. Extension.extension:gene
Slice Name	gene
Definition	R5: `SubstanceReferenceInformation.gene.gene` (new:CodeableConcept)
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene.gene` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..1
Type	Extension
Requirements	Element `SubstanceReferenceInformation.gene.gene` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.gene` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.gene` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
18. Extension.extension:gene.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	xml:id (or equivalent in JSON)
Control	0..1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
20. Extension.extension:gene.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to 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
Alternate Names	extensions, user content
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:gene.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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`gene`
24. Extension.extension:gene.value[x]
Definition	Todo.
Short	Todo
Control	0..1
Type	CodeableConcept
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
26. Extension.extension:source
Slice Name	source
Definition	R5: `SubstanceReferenceInformation.gene.source` (new:Reference(DocumentReference))
Short	R5: Todo (new)
Comments	Element `SubstanceReferenceInformation.gene.source` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.source` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
Control	0..*
Type	Extension
Requirements	Element `SubstanceReferenceInformation.gene.source` is part of an existing definition because parent element `SubstanceReferenceInformation.gene` requires a cross-version extension. Element `SubstanceReferenceInformation.gene.source` is not mapped to FHIR STU3, since FHIR R5 `SubstanceReferenceInformation` is not mapped. Element `SubstanceReferenceInformation.gene.source` has no mapping targets in FHIR STU3. Typically, this is because the element has been added (is a new element).
28. Extension.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	xml:id (or equivalent in JSON)
Control	0..1
Type	string
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
30. Extension.extension:source.extension
Definition	May be used to represent additional information that is not part of the basic definition of the element. In order 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 is allowed to 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
Alternate Names	extensions, user content
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: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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`source`
34. Extension.extension:source.value[x]
Definition	Todo.
Short	Todo
Control	0..1
Type	Reference(Cross-version Profile for R5.DocumentReference for use in FHIR STU3, Media)
[x] Note	SeeChoice of Data Typesfor further information about how to use [x]
36. 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
Primitive Value	This primitive element may be present, or absent, or replaced by an extension
XML Format	In the XML format, this property is represented as an attribute.
Fixed Value	`http://hl7.org/fhir/5.0/StructureDefinition/extension-SubstanceReferenceInformation.gene`
38. Extension.value[x]
Definition	Value of extension - may be a resource or one of a constrained set of the data types (see Extensibility in the spec for list).
Short	Value of extension
Control	0..0
Type	Choice of: base64Binary, boolean, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, Meta
Primitive Value	This primitive element may be present, or absent, or replaced by an extension