StructureDefinition: elementdefinition-de

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StructureDefinition: elementdefinition-de

FHIR Infrastructure Work Group

Maturity Level: 1

Trial Use

Use Context: Any

The official URL for this profile is:

http://hl7.org/fhir/StructureDefinition/elementdefinition-de

Identifies how the ElementDefinition data type is used when it appears within a data element

This profile was published on Sat, Feb 28, 2015 00:00+1100 as a draft by Health Level Seven International (Orders and Observations).

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This structure is derived from ElementDefinition.

Summary

Prohibited: 10 elements

Extensions

This structure refers to these extensions:

This structure is derived from ElementDefinition.

Name	Card.	Type	Description & Constraints
ElementDefinition	0..*
elementdefinition-question	0..*	string	Prompt for element phrased as question URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-question
elementdefinition-allowedUnits	0..1	CodeableConcept, canonical(ValueSet)	Units to use for measured value URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits Binding: UCUM Codes (required)
representation	0..0
slicing	0..0
short	0..0
contentReference	0..0
type	0..*	Element
profile	0..0
aggregation	0..0
defaultValue[x]	0..1	base64Binary, boolean, canonical(), code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference(), SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
meaningWhenMissing	0..1	markdown
fixed[x]	0..0
pattern[x]	0..0
isModifier	0..0
isSummary	0..0
Documentation for this format

Name	Flags	Card.	Type	Description & Constraints
ElementDefinition	I	0..*		Definition of an element in a resource or extension
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
elementdefinition-question	I	0..*	string	Prompt for element phrased as question URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-question
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/elementdefinition-question"
value[x]	I	1..1	string	Value of extension
elementdefinition-allowedUnits	I	0..1	CodeableConcept, canonical(ValueSet)	Units to use for measured value URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits Binding: UCUM Codes (required)
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits"
value[x]	I	1..1		Value of extension Binding: UCUM Codes (required)
valueCodeableConcept			CodeableConcept
valueCanonical			canonical(valueset.html)
modifierExtension	?!ΣI	0..*	Extension	Extensions that cannot be ignored even if unrecognized
path	ΣI	1..1	string	Path of the element in the hierarchy of elements
sliceName	ΣI	0..1	string	Name for this particular element (in a set of slices)
sliceIsConstraining	ΣI	0..1	boolean	If this slice definition constrains an inherited slice definition (or not)
label	ΣI	0..1	string	Name for element to display with or prompt for element
code	ΣI	0..*	Coding	Corresponding codes in terminologies Binding: LOINC Codes (example)
definition	ΣI	0..1	markdown	Full formal definition as narrative text
comment	ΣI	0..1	markdown	Comments about the use of this element
requirements	ΣI	0..1	markdown	Why this resource has been created
alias	ΣI	0..*	string	Other names
min	ΣI	0..1	unsignedInt	Minimum Cardinality
max	ΣI	0..1	string	Maximum Cardinality (a number or ) eld-3: Max SHALL be a number or ""
base	ΣI	0..1	Element	Base definition information for tools
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
path	ΣI	1..1	string	Path that identifies the base element
min	ΣI	1..1	unsignedInt	Min cardinality of the base element
max	ΣI	1..1	string	Max cardinality of the base element
type	ΣI	0..*	Element	Data type and Profile for this element
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
code	ΣI	1..1	uri	Data type or Resource (reference to definition) Binding: FHIRDefinedType (extensible)
targetProfile	ΣI	0..*	canonical(StructureDefinition \| ImplementationGuide)	Profile (StructureDefinition or IG) on the Reference/canonical target - one must apply
versioning	ΣI	0..1	code	either \| independent \| specific Binding: ReferenceVersionRules (required)
defaultValue[x]	ΣI	0..1		Specified value if missing from instance
defaultValueBase64Binary			base64Binary
defaultValueBoolean			boolean
defaultValueCanonical			canonical()
defaultValueCode			code
defaultValueDate			date
defaultValueDateTime			dateTime
defaultValueDecimal			decimal
defaultValueId			id
defaultValueInstant			instant
defaultValueInteger			integer
defaultValueMarkdown			markdown
defaultValueOid			oid
defaultValuePositiveInt			positiveInt
defaultValueString			string
defaultValueTime			time
defaultValueUnsignedInt			unsignedInt
defaultValueUri			uri
defaultValueUrl			url
defaultValueUuid			uuid
defaultValueAddress			Address
defaultValueAge			Age
defaultValueAnnotation			Annotation
defaultValueAttachment			Attachment
defaultValueCodeableConcept			CodeableConcept
defaultValueCoding			Coding
defaultValueContactPoint			ContactPoint
defaultValueCount			Count
defaultValueDistance			Distance
defaultValueDuration			Duration
defaultValueHumanName			HumanName
defaultValueIdentifier			Identifier
defaultValueMoney			Money
defaultValuePeriod			Period
defaultValueQuantity			Quantity
defaultValueRange			Range
defaultValueRatio			Ratio
defaultValueReference			Reference()
defaultValueSampledData			SampledData
defaultValueSignature			Signature
defaultValueTiming			Timing
defaultValueContactDetail			ContactDetail
defaultValueContributor			Contributor
defaultValueDataRequirement			DataRequirement
defaultValueExpression			Expression
defaultValueParameterDefinition			ParameterDefinition
defaultValueRelatedArtifact			RelatedArtifact
defaultValueTriggerDefinition			TriggerDefinition
defaultValueUsageContext			UsageContext
defaultValueDosage			Dosage
defaultValueMeta			Meta
meaningWhenMissing	ΣI	0..1	markdown	Implicit meaning when this element is missing
orderMeaning	ΣI	0..1	string	What the order of the elements means
example	ΣI	0..*	Element	Example value (as defined for type)
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
label	ΣI	1..1	string	Describes the purpose of this example
value[x]	ΣI	1..1		Value of Example (one of allowed types)
valueBase64Binary			base64Binary
valueBoolean			boolean
valueCanonical			canonical()
valueCode			code
valueDate			date
valueDateTime			dateTime
valueDecimal			decimal
valueId			id
valueInstant			instant
valueInteger			integer
valueMarkdown			markdown
valueOid			oid
valuePositiveInt			positiveInt
valueString			string
valueTime			time
valueUnsignedInt			unsignedInt
valueUri			uri
valueUrl			url
valueUuid			uuid
valueAddress			Address
valueAge			Age
valueAnnotation			Annotation
valueAttachment			Attachment
valueCodeableConcept			CodeableConcept
valueCoding			Coding
valueContactPoint			ContactPoint
valueCount			Count
valueDistance			Distance
valueDuration			Duration
valueHumanName			HumanName
valueIdentifier			Identifier
valueMoney			Money
valuePeriod			Period
valueQuantity			Quantity
valueRange			Range
valueRatio			Ratio
valueReference			Reference()
valueSampledData			SampledData
valueSignature			Signature
valueTiming			Timing
valueContactDetail			ContactDetail
valueContributor			Contributor
valueDataRequirement			DataRequirement
valueExpression			Expression
valueParameterDefinition			ParameterDefinition
valueRelatedArtifact			RelatedArtifact
valueTriggerDefinition			TriggerDefinition
valueUsageContext			UsageContext
valueDosage			Dosage
valueMeta			Meta
minValue[x]	ΣI	0..1		Minimum Allowed Value (for some types)
minValueDate			date
minValueDateTime			dateTime
minValueInstant			instant
minValueTime			time
minValueDecimal			decimal
minValueInteger			integer
minValuePositiveInt			positiveInt
minValueUnsignedInt			unsignedInt
minValueQuantity			Quantity
maxValue[x]	ΣI	0..1		Maximum Allowed Value (for some types)
maxValueDate			date
maxValueDateTime			dateTime
maxValueInstant			instant
maxValueTime			time
maxValueDecimal			decimal
maxValueInteger			integer
maxValuePositiveInt			positiveInt
maxValueUnsignedInt			unsignedInt
maxValueQuantity			Quantity
maxLength	ΣI	0..1	integer	Max length for strings
condition	ΣI	0..*	id	Reference to invariant about presence
constraint	ΣI	0..*	Element	Condition that must evaluate to true eld-21: Constraints should have an expression or else validators will not be able to enforce them
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
key	ΣI	1..1	id	Target of 'condition' reference above
requirements	ΣI	0..1	string	Why this constraint is necessary or appropriate
severity	ΣI	1..1	code	error \| warning Binding: ConstraintSeverity (required)
human	ΣI	1..1	string	Human description of constraint
expression	ΣI	0..1	string	FHIRPath expression of constraint
xpath	ΣI	0..1	string	XPath expression of constraint
source	ΣI	0..1	canonical(StructureDefinition)	Reference to original source of constraint
mustSupport	ΣI	0..1	boolean	If the element must be supported
isModifierReason	ΣI	0..1	string	Reason that this element is marked as a modifier
binding	ΣI	0..1	Element	ValueSet details if this is coded eld-12: ValueSet SHALL start with http:// or https:// or urn:
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
strength	ΣI	1..1	code	required \| extensible \| preferred \| example Binding: BindingStrength (required)
description	ΣI	0..1	string	Human explanation of the value set
valueSet	ΣI	0..1	canonical(ValueSet)	Source of value set
mapping	ΣI	0..*	Element	Map element to another set of definitions
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
identity	ΣI	1..1	id	Reference to mapping declaration
language	ΣI	0..1	code	Computable language of mapping Binding: MimeType (required)
map	ΣI	1..1	string	Details of the mapping
comment	ΣI	0..1	string	Comments about the mapping or its use
Documentation for this format

<!-- DataElement constraint on ElementDefinition data type -->

<ElementDefinition xmlns="http://hl7.org/fhir"
>
  <!-- from Element: extension -->
 <modifierExtension><!--  0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
 <path value="[string]"/><!--  1..1 Path of the element in the hierarchy of elements -->
 <representation value="[code]"/><!--  0..0 xmlAttr | xmlText | typeAttr | cdaText | xhtml -->
 <sliceName value="[string]"/><!--  0..1 Name for this particular element (in a set of slices) -->
 <sliceIsConstraining value="[boolean]"/><!--  0..1 
     If this slice definition constrains an inherited slice definition (or not) -->
 <label value="[string]"/><!--  0..1 Name for element to display with or prompt for element -->
 <code><!--  0..* Coding Corresponding codes in terminologies --></code>
 <slicing>  0..0 Element  <!--  0..0 This element is sliced - slices follow -->
 </slicing>
 <short value="[string]"/><!--  0..0 Concise definition for space-constrained presentation -->
 <definition value="[markdown]"/><!--  0..1 Full formal definition as narrative text -->
 <comment value="[markdown]"/><!--  0..1 Comments about the use of this element -->
 <requirements value="[markdown]"/><!--  0..1 Why this resource has been created -->
 <alias value="[string]"/><!--  0..* Other names -->
 <min value="[unsignedInt]"/><!--  0..1 Minimum Cardinality -->
 <max value="[string]"/><!--  0..1 Maximum Cardinality (a number or *) -->
 <base>  0..1 Element  <!--  0..1 Base definition information for tools -->
  <path value="[string]"/><!--  1..1 Path that identifies the base element -->
  <min value="[unsignedInt]"/><!--  1..1 Min cardinality of the base element -->
  <max value="[string]"/><!--  1..1 Max cardinality of the base element -->
 </base>
 <contentReference value="[uri]"/><!--  0..0 Reference to definition of content for the element -->
 <type>  0..* Element  <!--  0..* Data type and Profile for this element -->
  <code value="[uri]"/><!--  1..1 Data type or Resource (reference to definition) -->
  <profile value="[canonical]"/><!--  0..0 Profiles (StructureDefinition or IG) - one must apply -->
  <targetProfile value="[canonical]"/><!--  0..* 
      Profile (StructureDefinition or IG) on the Reference/canonical target - one must apply -->
  <aggregation value="[code]"/><!--  0..0 contained | referenced | bundled - how aggregated -->
  <versioning value="[code]"/><!--  0..1 either | independent | specific -->
 </type>
 <defaultValue[x]><!--  0..1 base64Binary|boolean|canonical|
   code|date|dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|string|
   time|unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|
   CodeableConcept|Coding|ContactPoint|Count|Distance|Duration|HumanName|
   Identifier|Money|Period|Quantity|Range|Ratio|Reference|SampledData|Signature|
   Timing|ContactDetail|Contributor|DataRequirement|Expression|
   ParameterDefinition|RelatedArtifact|TriggerDefinition|UsageContext|Dosage|
   Meta Specified value if missing from instance --></defaultValue[x]>
 <meaningWhenMissing value="[markdown]"/><!--  0..1 Implicit meaning when this element is missing -->
 <orderMeaning value="[string]"/><!--  0..1 What the order of the elements means -->
 <fixed[x]><!--  0..0 base64Binary|boolean|canonical|code|date|
   dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|string|time|
   unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|CodeableConcept|
   Coding|ContactPoint|Count|Distance|Duration|HumanName|Identifier|Money|Period|
   Quantity|Range|Ratio|Reference|SampledData|Signature|Timing|ContactDetail|
   Contributor|DataRequirement|Expression|ParameterDefinition|RelatedArtifact|
   TriggerDefinition|UsageContext|Dosage|Meta Value must be exactly this --></fixed[x]>
 <pattern[x]><!--  0..0 base64Binary|boolean|canonical|code|
   date|dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|string|time|
   unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|CodeableConcept|
   Coding|ContactPoint|Count|Distance|Duration|HumanName|Identifier|Money|Period|
   Quantity|Range|Ratio|Reference|SampledData|Signature|Timing|ContactDetail|
   Contributor|DataRequirement|Expression|ParameterDefinition|RelatedArtifact|
   TriggerDefinition|UsageContext|Dosage|Meta 
     Value must have at least these property values --></pattern[x]>
 <example>  0..* Element  <!--  0..* Example value (as defined for type) -->
  <label value="[string]"/><!--  1..1 Describes the purpose of this example -->
  <value[x]><!--  1..1 base64Binary|boolean|canonical|
    code|date|dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|
    string|time|unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|
    CodeableConcept|Coding|ContactPoint|Count|Distance|Duration|HumanName|
    Identifier|Money|Period|Quantity|Range|Ratio|Reference|SampledData|Signature|
    Timing|ContactDetail|Contributor|DataRequirement|Expression|
    ParameterDefinition|RelatedArtifact|TriggerDefinition|UsageContext|Dosage|
    Meta Value of Example (one of allowed types) --></value[x]>
 </example>
 <minValue[x]><!--  0..1 date|dateTime|instant|time|decimal|
   integer|positiveInt|unsignedInt|Quantity 
     Minimum Allowed Value (for some types) --></minValue[x]>
 <maxValue[x]><!--  0..1 date|dateTime|instant|time|decimal|
   integer|positiveInt|unsignedInt|Quantity 
     Maximum Allowed Value (for some types) --></maxValue[x]>
 <maxLength value="[integer]"/><!--  0..1 Max length for strings -->
 <condition value="[id]"/><!--  0..* Reference to invariant about presence -->
 <constraint>  0..* Element  <!--  0..* Condition that must evaluate to true -->
  <key value="[id]"/><!--  1..1 Target of 'condition' reference above -->
  <requirements value="[string]"/><!--  0..1 Why this constraint is necessary or appropriate -->
  <severity value="[code]"/><!--  1..1 error | warning -->
  <human value="[string]"/><!--  1..1 Human description of constraint -->
  <expression value="[string]"/><!--  0..1 FHIRPath expression of constraint -->
  <xpath value="[string]"/><!--  0..1 XPath expression of constraint -->
  <source value="[canonical]"/><!--  0..1 Reference to original source of constraint -->
 </constraint>
 <mustSupport value="[boolean]"/><!--  0..1 If the element must be supported -->
 <isModifier value="[boolean]"/><!--  0..0 If this modifies the meaning of other elements -->
 <isModifierReason value="[string]"/><!--  0..1 Reason that this element is marked as a modifier -->
 <isSummary value="[boolean]"/><!--  0..0 Include when _summary = true? -->
 <binding>  0..1 Element  <!--  0..1 ValueSet details if this is coded -->
  <strength value="[code]"/><!--  1..1 required | extensible | preferred | example -->
  <description value="[string]"/><!--  0..1 Human explanation of the value set -->
  <valueSet value="[canonical]"/><!--  0..1 Source of value set -->
 </binding>
 <mapping>  0..* Element  <!--  0..* Map element to another set of definitions -->
  <identity value="[id]"/><!--  1..1 Reference to mapping declaration -->
  <language value="[code]"/><!--  0..1 Computable language of mapping -->
  <map value="[string]"/><!--  1..1 Details of the mapping -->
  <comment value="[string]"/><!--  0..1 Comments about the mapping or its use -->
 </mapping>
</ElementDefinition>

{ // DataElement constraint on ElementDefinition data type
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open 
      { // Prompt for element phrased as question // C?
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-question", // R! 
        "valueString" : "<string>" // C? R! Value of extension
      },
      { // Units to use for measured value // C?
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits", // R! 
// value[x]: Value of extension. One of these 2:
        "valueCodeableConcept" : { CodeableConcept } // C? R! Value of extension
        "valueCanonical" : "<canonical>", // C? R! Value of extension
      }
    ],
    "modifierExtension" : [{ Extension }], // C?Extensions that cannot be ignored even if unrecognized
    "path" : "<string>", // C? R! Path of the element in the hierarchy of elements
    "sliceName" : "<string>", // C?Name for this particular element (in a set of slices)
    "sliceIsConstraining" : <boolean>, // C?If this slice definition constrains an inherited slice definition (or not)
    "label" : "<string>", // C?Name for element to display with or prompt for element
    "code" : [{ Coding }], // C?Corresponding codes in terminologies
    "definition" : "<markdown>", // C?Full formal definition as narrative text
    "comment" : "<markdown>", // C?Comments about the use of this element
    "requirements" : "<markdown>", // C?Why this resource has been created
    "alias" : ["<string>"], // C?Other names
    "min" : "<unsignedInt>", // C?Minimum Cardinality
    "max" : "<string>", // C?Maximum Cardinality (a number or *)
    "base" : { Element }, // C?Base definition information for tools
    "type" : [{ Element }], // C?Data type and Profile for this element
// value[x]: Specified value if missing from instance. One of these 50:
    "defaultValueBase64Binary" : "<base64Binary>", // C?Specified value if missing from instance
    "defaultValueBoolean" : <boolean>, // C?Specified value if missing from instance
    "defaultValueCanonical" : "<canonical>", // C?Specified value if missing from instance
    "defaultValueCode" : "<code>", // C?Specified value if missing from instance
    "defaultValueDate" : "<date>", // C?Specified value if missing from instance
    "defaultValueDateTime" : "<dateTime>", // C?Specified value if missing from instance
    "defaultValueDecimal" : <decimal>, // C?Specified value if missing from instance
    "defaultValueId" : "<id>", // C?Specified value if missing from instance
    "defaultValueInstant" : "<instant>", // C?Specified value if missing from instance
    "defaultValueInteger" : <integer>, // C?Specified value if missing from instance
    "defaultValueMarkdown" : "<markdown>", // C?Specified value if missing from instance
    "defaultValueOid" : "<oid>", // C?Specified value if missing from instance
    "defaultValuePositiveInt" : "<positiveInt>", // C?Specified value if missing from instance
    "defaultValueString" : "<string>", // C?Specified value if missing from instance
    "defaultValueTime" : "<time>", // C?Specified value if missing from instance
    "defaultValueUnsignedInt" : "<unsignedInt>", // C?Specified value if missing from instance
    "defaultValueUri" : "<uri>", // C?Specified value if missing from instance
    "defaultValueUrl" : "<url>", // C?Specified value if missing from instance
    "defaultValueUuid" : "<uuid>" // C?Specified value if missing from instance
    "defaultValueAddress" : { Address }, // C?Specified value if missing from instance
    "defaultValueAge" : { Age }, // C?Specified value if missing from instance
    "defaultValueAnnotation" : { Annotation }, // C?Specified value if missing from instance
    "defaultValueAttachment" : { Attachment }, // C?Specified value if missing from instance
    "defaultValueCodeableConcept" : { CodeableConcept }, // C?Specified value if missing from instance
    "defaultValueCoding" : { Coding }, // C?Specified value if missing from instance
    "defaultValueContactPoint" : { ContactPoint }, // C?Specified value if missing from instance
    "defaultValueCount" : { Count }, // C?Specified value if missing from instance
    "defaultValueDistance" : { Distance }, // C?Specified value if missing from instance
    "defaultValueDuration" : { Duration }, // C?Specified value if missing from instance
    "defaultValueHumanName" : { HumanName }, // C?Specified value if missing from instance
    "defaultValueIdentifier" : { Identifier }, // C?Specified value if missing from instance
    "defaultValueMoney" : { Money }, // C?Specified value if missing from instance
    "defaultValuePeriod" : { Period }, // C?Specified value if missing from instance
    "defaultValueQuantity" : { Quantity }, // C?Specified value if missing from instance
    "defaultValueRange" : { Range }, // C?Specified value if missing from instance
    "defaultValueRatio" : { Ratio }, // C?Specified value if missing from instance
    "defaultValueReference" : { Reference }, // C?Specified value if missing from instance
    "defaultValueSampledData" : { SampledData }, // C?Specified value if missing from instance
    "defaultValueSignature" : { Signature }, // C?Specified value if missing from instance
    "defaultValueTiming" : { Timing }, // C?Specified value if missing from instance
    "defaultValueContactDetail" : { ContactDetail }, // C?Specified value if missing from instance
    "defaultValueContributor" : { Contributor }, // C?Specified value if missing from instance
    "defaultValueDataRequirement" : { DataRequirement }, // C?Specified value if missing from instance
    "defaultValueExpression" : { Expression }, // C?Specified value if missing from instance
    "defaultValueParameterDefinition" : { ParameterDefinition }, // C?Specified value if missing from instance
    "defaultValueRelatedArtifact" : { RelatedArtifact }, // C?Specified value if missing from instance
    "defaultValueTriggerDefinition" : { TriggerDefinition }, // C?Specified value if missing from instance
    "defaultValueUsageContext" : { UsageContext }, // C?Specified value if missing from instance
    "defaultValueDosage" : { Dosage }, // C?Specified value if missing from instance
    "defaultValueMeta" : { Meta }, // C?Specified value if missing from instance
    "meaningWhenMissing" : "<markdown>", // C?Implicit meaning when this element is missing
    "orderMeaning" : "<string>", // C?What the order of the elements means
// value[x]: Value must be exactly this. One of these 50:
// value[x]: Value must have at least these property values. One of these 50:
    "example" : [{ Element }], // C?Example value (as defined for type)
// value[x]: Minimum Allowed Value (for some types). One of these 9:
    "minValueDate" : "<date>", // C?Minimum Allowed Value (for some types)
    "minValueDateTime" : "<dateTime>", // C?Minimum Allowed Value (for some types)
    "minValueInstant" : "<instant>", // C?Minimum Allowed Value (for some types)
    "minValueTime" : "<time>", // C?Minimum Allowed Value (for some types)
    "minValueDecimal" : <decimal>, // C?Minimum Allowed Value (for some types)
    "minValueInteger" : <integer>, // C?Minimum Allowed Value (for some types)
    "minValuePositiveInt" : "<positiveInt>", // C?Minimum Allowed Value (for some types)
    "minValueUnsignedInt" : "<unsignedInt>", // C?Minimum Allowed Value (for some types)
    "minValueQuantity" : { Quantity }, // C?Minimum Allowed Value (for some types)
// value[x]: Maximum Allowed Value (for some types). One of these 9:
    "maxValueDate" : "<date>", // C?Maximum Allowed Value (for some types)
    "maxValueDateTime" : "<dateTime>", // C?Maximum Allowed Value (for some types)
    "maxValueInstant" : "<instant>", // C?Maximum Allowed Value (for some types)
    "maxValueTime" : "<time>", // C?Maximum Allowed Value (for some types)
    "maxValueDecimal" : <decimal>, // C?Maximum Allowed Value (for some types)
    "maxValueInteger" : <integer>, // C?Maximum Allowed Value (for some types)
    "maxValuePositiveInt" : "<positiveInt>", // C?Maximum Allowed Value (for some types)
    "maxValueUnsignedInt" : "<unsignedInt>", // C?Maximum Allowed Value (for some types)
    "maxValueQuantity" : { Quantity }, // C?Maximum Allowed Value (for some types)
    "maxLength" : <integer>, // C?Max length for strings
    "condition" : ["<id>"], // C?Reference to invariant about presence
    "constraint" : [{ Element }], // C?Condition that must evaluate to true
    "mustSupport" : <boolean>, // C?If the element must be supported
    "isModifierReason" : "<string>", // C?Reason that this element is marked as a modifier
    "binding" : { Element }, // C?ValueSet details if this is coded
    "mapping" : [{ Element }], // C?Map element to another set of definitions
  }

This structure is derived from ElementDefinition.

Summary

Prohibited: 10 elements

Extensions

This structure refers to these extensions:

Differential View

This structure is derived from ElementDefinition.

Name	Card.	Type	Description & Constraints
ElementDefinition	0..*
elementdefinition-question	0..*	string	Prompt for element phrased as question URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-question
elementdefinition-allowedUnits	0..1	CodeableConcept, canonical(ValueSet)	Units to use for measured value URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits Binding: UCUM Codes (required)
representation	0..0
slicing	0..0
short	0..0
contentReference	0..0
type	0..*	Element
profile	0..0
aggregation	0..0
defaultValue[x]	0..1	base64Binary, boolean, canonical(), code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference(), SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
meaningWhenMissing	0..1	markdown
fixed[x]	0..0
pattern[x]	0..0
isModifier	0..0
isSummary	0..0
Documentation for this format

Snapshot View

Name	Flags	Card.	Type	Description & Constraints
ElementDefinition	I	0..*		Definition of an element in a resource or extension
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
elementdefinition-question	I	0..*	string	Prompt for element phrased as question URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-question
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/elementdefinition-question"
value[x]	I	1..1	string	Value of extension
elementdefinition-allowedUnits	I	0..1	CodeableConcept, canonical(ValueSet)	Units to use for measured value URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits Binding: UCUM Codes (required)
id		0..1	string	Unique id for inter-element referencing
extension	I	0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits"
value[x]	I	1..1		Value of extension Binding: UCUM Codes (required)
valueCodeableConcept			CodeableConcept
valueCanonical			canonical(valueset.html)
modifierExtension	?!ΣI	0..*	Extension	Extensions that cannot be ignored even if unrecognized
path	ΣI	1..1	string	Path of the element in the hierarchy of elements
sliceName	ΣI	0..1	string	Name for this particular element (in a set of slices)
sliceIsConstraining	ΣI	0..1	boolean	If this slice definition constrains an inherited slice definition (or not)
label	ΣI	0..1	string	Name for element to display with or prompt for element
code	ΣI	0..*	Coding	Corresponding codes in terminologies Binding: LOINC Codes (example)
definition	ΣI	0..1	markdown	Full formal definition as narrative text
comment	ΣI	0..1	markdown	Comments about the use of this element
requirements	ΣI	0..1	markdown	Why this resource has been created
alias	ΣI	0..*	string	Other names
min	ΣI	0..1	unsignedInt	Minimum Cardinality
max	ΣI	0..1	string	Maximum Cardinality (a number or ) eld-3: Max SHALL be a number or ""
base	ΣI	0..1	Element	Base definition information for tools
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
path	ΣI	1..1	string	Path that identifies the base element
min	ΣI	1..1	unsignedInt	Min cardinality of the base element
max	ΣI	1..1	string	Max cardinality of the base element
type	ΣI	0..*	Element	Data type and Profile for this element
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
code	ΣI	1..1	uri	Data type or Resource (reference to definition) Binding: FHIRDefinedType (extensible)
targetProfile	ΣI	0..*	canonical(StructureDefinition \| ImplementationGuide)	Profile (StructureDefinition or IG) on the Reference/canonical target - one must apply
versioning	ΣI	0..1	code	either \| independent \| specific Binding: ReferenceVersionRules (required)
defaultValue[x]	ΣI	0..1		Specified value if missing from instance
defaultValueBase64Binary			base64Binary
defaultValueBoolean			boolean
defaultValueCanonical			canonical()
defaultValueCode			code
defaultValueDate			date
defaultValueDateTime			dateTime
defaultValueDecimal			decimal
defaultValueId			id
defaultValueInstant			instant
defaultValueInteger			integer
defaultValueMarkdown			markdown
defaultValueOid			oid
defaultValuePositiveInt			positiveInt
defaultValueString			string
defaultValueTime			time
defaultValueUnsignedInt			unsignedInt
defaultValueUri			uri
defaultValueUrl			url
defaultValueUuid			uuid
defaultValueAddress			Address
defaultValueAge			Age
defaultValueAnnotation			Annotation
defaultValueAttachment			Attachment
defaultValueCodeableConcept			CodeableConcept
defaultValueCoding			Coding
defaultValueContactPoint			ContactPoint
defaultValueCount			Count
defaultValueDistance			Distance
defaultValueDuration			Duration
defaultValueHumanName			HumanName
defaultValueIdentifier			Identifier
defaultValueMoney			Money
defaultValuePeriod			Period
defaultValueQuantity			Quantity
defaultValueRange			Range
defaultValueRatio			Ratio
defaultValueReference			Reference()
defaultValueSampledData			SampledData
defaultValueSignature			Signature
defaultValueTiming			Timing
defaultValueContactDetail			ContactDetail
defaultValueContributor			Contributor
defaultValueDataRequirement			DataRequirement
defaultValueExpression			Expression
defaultValueParameterDefinition			ParameterDefinition
defaultValueRelatedArtifact			RelatedArtifact
defaultValueTriggerDefinition			TriggerDefinition
defaultValueUsageContext			UsageContext
defaultValueDosage			Dosage
defaultValueMeta			Meta
meaningWhenMissing	ΣI	0..1	markdown	Implicit meaning when this element is missing
orderMeaning	ΣI	0..1	string	What the order of the elements means
example	ΣI	0..*	Element	Example value (as defined for type)
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
label	ΣI	1..1	string	Describes the purpose of this example
value[x]	ΣI	1..1		Value of Example (one of allowed types)
valueBase64Binary			base64Binary
valueBoolean			boolean
valueCanonical			canonical()
valueCode			code
valueDate			date
valueDateTime			dateTime
valueDecimal			decimal
valueId			id
valueInstant			instant
valueInteger			integer
valueMarkdown			markdown
valueOid			oid
valuePositiveInt			positiveInt
valueString			string
valueTime			time
valueUnsignedInt			unsignedInt
valueUri			uri
valueUrl			url
valueUuid			uuid
valueAddress			Address
valueAge			Age
valueAnnotation			Annotation
valueAttachment			Attachment
valueCodeableConcept			CodeableConcept
valueCoding			Coding
valueContactPoint			ContactPoint
valueCount			Count
valueDistance			Distance
valueDuration			Duration
valueHumanName			HumanName
valueIdentifier			Identifier
valueMoney			Money
valuePeriod			Period
valueQuantity			Quantity
valueRange			Range
valueRatio			Ratio
valueReference			Reference()
valueSampledData			SampledData
valueSignature			Signature
valueTiming			Timing
valueContactDetail			ContactDetail
valueContributor			Contributor
valueDataRequirement			DataRequirement
valueExpression			Expression
valueParameterDefinition			ParameterDefinition
valueRelatedArtifact			RelatedArtifact
valueTriggerDefinition			TriggerDefinition
valueUsageContext			UsageContext
valueDosage			Dosage
valueMeta			Meta
minValue[x]	ΣI	0..1		Minimum Allowed Value (for some types)
minValueDate			date
minValueDateTime			dateTime
minValueInstant			instant
minValueTime			time
minValueDecimal			decimal
minValueInteger			integer
minValuePositiveInt			positiveInt
minValueUnsignedInt			unsignedInt
minValueQuantity			Quantity
maxValue[x]	ΣI	0..1		Maximum Allowed Value (for some types)
maxValueDate			date
maxValueDateTime			dateTime
maxValueInstant			instant
maxValueTime			time
maxValueDecimal			decimal
maxValueInteger			integer
maxValuePositiveInt			positiveInt
maxValueUnsignedInt			unsignedInt
maxValueQuantity			Quantity
maxLength	ΣI	0..1	integer	Max length for strings
condition	ΣI	0..*	id	Reference to invariant about presence
constraint	ΣI	0..*	Element	Condition that must evaluate to true eld-21: Constraints should have an expression or else validators will not be able to enforce them
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
key	ΣI	1..1	id	Target of 'condition' reference above
requirements	ΣI	0..1	string	Why this constraint is necessary or appropriate
severity	ΣI	1..1	code	error \| warning Binding: ConstraintSeverity (required)
human	ΣI	1..1	string	Human description of constraint
expression	ΣI	0..1	string	FHIRPath expression of constraint
xpath	ΣI	0..1	string	XPath expression of constraint
source	ΣI	0..1	canonical(StructureDefinition)	Reference to original source of constraint
mustSupport	ΣI	0..1	boolean	If the element must be supported
isModifierReason	ΣI	0..1	string	Reason that this element is marked as a modifier
binding	ΣI	0..1	Element	ValueSet details if this is coded eld-12: ValueSet SHALL start with http:// or https:// or urn:
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
strength	ΣI	1..1	code	required \| extensible \| preferred \| example Binding: BindingStrength (required)
description	ΣI	0..1	string	Human explanation of the value set
valueSet	ΣI	0..1	canonical(ValueSet)	Source of value set
mapping	ΣI	0..*	Element	Map element to another set of definitions
id		0..1	string	Unique id for inter-element referencing
extension	I	0..*	Extension	Additional content defined by implementations Slice: Unordered, Open by value:url
identity	ΣI	1..1	id	Reference to mapping declaration
language	ΣI	0..1	code	Computable language of mapping Binding: MimeType (required)
map	ΣI	1..1	string	Details of the mapping
comment	ΣI	0..1	string	Comments about the mapping or its use
Documentation for this format

XML Template

<!-- DataElement constraint on ElementDefinition data type -->

<ElementDefinition xmlns="http://hl7.org/fhir"
>
  <!-- from Element: extension -->
 <modifierExtension><!--  0..* Extension  Extensions that cannot be ignored even if unrecognized  --></modifierExtension>
 <path value="[string]"/><!--  1..1 Path of the element in the hierarchy of elements -->
 <representation value="[code]"/><!--  0..0 xmlAttr | xmlText | typeAttr | cdaText | xhtml -->
 <sliceName value="[string]"/><!--  0..1 Name for this particular element (in a set of slices) -->
 <sliceIsConstraining value="[boolean]"/><!--  0..1 
     If this slice definition constrains an inherited slice definition (or not) -->
 <label value="[string]"/><!--  0..1 Name for element to display with or prompt for element -->
 <code><!--  0..* Coding Corresponding codes in terminologies --></code>
 <slicing>  0..0 Element  <!--  0..0 This element is sliced - slices follow -->
 </slicing>
 <short value="[string]"/><!--  0..0 Concise definition for space-constrained presentation -->
 <definition value="[markdown]"/><!--  0..1 Full formal definition as narrative text -->
 <comment value="[markdown]"/><!--  0..1 Comments about the use of this element -->
 <requirements value="[markdown]"/><!--  0..1 Why this resource has been created -->
 <alias value="[string]"/><!--  0..* Other names -->
 <min value="[unsignedInt]"/><!--  0..1 Minimum Cardinality -->
 <max value="[string]"/><!--  0..1 Maximum Cardinality (a number or *) -->
 <base>  0..1 Element  <!--  0..1 Base definition information for tools -->
  <path value="[string]"/><!--  1..1 Path that identifies the base element -->
  <min value="[unsignedInt]"/><!--  1..1 Min cardinality of the base element -->
  <max value="[string]"/><!--  1..1 Max cardinality of the base element -->
 </base>
 <contentReference value="[uri]"/><!--  0..0 Reference to definition of content for the element -->
 <type>  0..* Element  <!--  0..* Data type and Profile for this element -->
  <code value="[uri]"/><!--  1..1 Data type or Resource (reference to definition) -->
  <profile value="[canonical]"/><!--  0..0 Profiles (StructureDefinition or IG) - one must apply -->
  <targetProfile value="[canonical]"/><!--  0..* 
      Profile (StructureDefinition or IG) on the Reference/canonical target - one must apply -->
  <aggregation value="[code]"/><!--  0..0 contained | referenced | bundled - how aggregated -->
  <versioning value="[code]"/><!--  0..1 either | independent | specific -->
 </type>
 <defaultValue[x]><!--  0..1 base64Binary|boolean|canonical|
   code|date|dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|string|
   time|unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|
   CodeableConcept|Coding|ContactPoint|Count|Distance|Duration|HumanName|
   Identifier|Money|Period|Quantity|Range|Ratio|Reference|SampledData|Signature|
   Timing|ContactDetail|Contributor|DataRequirement|Expression|
   ParameterDefinition|RelatedArtifact|TriggerDefinition|UsageContext|Dosage|
   Meta Specified value if missing from instance --></defaultValue[x]>
 <meaningWhenMissing value="[markdown]"/><!--  0..1 Implicit meaning when this element is missing -->
 <orderMeaning value="[string]"/><!--  0..1 What the order of the elements means -->
 <fixed[x]><!--  0..0 base64Binary|boolean|canonical|code|date|
   dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|string|time|
   unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|CodeableConcept|
   Coding|ContactPoint|Count|Distance|Duration|HumanName|Identifier|Money|Period|
   Quantity|Range|Ratio|Reference|SampledData|Signature|Timing|ContactDetail|
   Contributor|DataRequirement|Expression|ParameterDefinition|RelatedArtifact|
   TriggerDefinition|UsageContext|Dosage|Meta Value must be exactly this --></fixed[x]>
 <pattern[x]><!--  0..0 base64Binary|boolean|canonical|code|
   date|dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|string|time|
   unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|CodeableConcept|
   Coding|ContactPoint|Count|Distance|Duration|HumanName|Identifier|Money|Period|
   Quantity|Range|Ratio|Reference|SampledData|Signature|Timing|ContactDetail|
   Contributor|DataRequirement|Expression|ParameterDefinition|RelatedArtifact|
   TriggerDefinition|UsageContext|Dosage|Meta 
     Value must have at least these property values --></pattern[x]>
 <example>  0..* Element  <!--  0..* Example value (as defined for type) -->
  <label value="[string]"/><!--  1..1 Describes the purpose of this example -->
  <value[x]><!--  1..1 base64Binary|boolean|canonical|
    code|date|dateTime|decimal|id|instant|integer|markdown|oid|positiveInt|
    string|time|unsignedInt|uri|url|uuid|Address|Age|Annotation|Attachment|
    CodeableConcept|Coding|ContactPoint|Count|Distance|Duration|HumanName|
    Identifier|Money|Period|Quantity|Range|Ratio|Reference|SampledData|Signature|
    Timing|ContactDetail|Contributor|DataRequirement|Expression|
    ParameterDefinition|RelatedArtifact|TriggerDefinition|UsageContext|Dosage|
    Meta Value of Example (one of allowed types) --></value[x]>
 </example>
 <minValue[x]><!--  0..1 date|dateTime|instant|time|decimal|
   integer|positiveInt|unsignedInt|Quantity 
     Minimum Allowed Value (for some types) --></minValue[x]>
 <maxValue[x]><!--  0..1 date|dateTime|instant|time|decimal|
   integer|positiveInt|unsignedInt|Quantity 
     Maximum Allowed Value (for some types) --></maxValue[x]>
 <maxLength value="[integer]"/><!--  0..1 Max length for strings -->
 <condition value="[id]"/><!--  0..* Reference to invariant about presence -->
 <constraint>  0..* Element  <!--  0..* Condition that must evaluate to true -->
  <key value="[id]"/><!--  1..1 Target of 'condition' reference above -->
  <requirements value="[string]"/><!--  0..1 Why this constraint is necessary or appropriate -->
  <severity value="[code]"/><!--  1..1 error | warning -->
  <human value="[string]"/><!--  1..1 Human description of constraint -->
  <expression value="[string]"/><!--  0..1 FHIRPath expression of constraint -->
  <xpath value="[string]"/><!--  0..1 XPath expression of constraint -->
  <source value="[canonical]"/><!--  0..1 Reference to original source of constraint -->
 </constraint>
 <mustSupport value="[boolean]"/><!--  0..1 If the element must be supported -->
 <isModifier value="[boolean]"/><!--  0..0 If this modifies the meaning of other elements -->
 <isModifierReason value="[string]"/><!--  0..1 Reason that this element is marked as a modifier -->
 <isSummary value="[boolean]"/><!--  0..0 Include when _summary = true? -->
 <binding>  0..1 Element  <!--  0..1 ValueSet details if this is coded -->
  <strength value="[code]"/><!--  1..1 required | extensible | preferred | example -->
  <description value="[string]"/><!--  0..1 Human explanation of the value set -->
  <valueSet value="[canonical]"/><!--  0..1 Source of value set -->
 </binding>
 <mapping>  0..* Element  <!--  0..* Map element to another set of definitions -->
  <identity value="[id]"/><!--  1..1 Reference to mapping declaration -->
  <language value="[code]"/><!--  0..1 Computable language of mapping -->
  <map value="[string]"/><!--  1..1 Details of the mapping -->
  <comment value="[string]"/><!--  0..1 Comments about the mapping or its use -->
 </mapping>
</ElementDefinition>

JSON Template

{ // DataElement constraint on ElementDefinition data type
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open 
      { // Prompt for element phrased as question // C?
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-question", // R! 
        "valueString" : "<string>" // C? R! Value of extension
      },
      { // Units to use for measured value // C?
        // from Element: extension
        "extension" : [ //  sliced by value:url  in the specified order, Open ]
        "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-allowedUnits", // R! 
// value[x]: Value of extension. One of these 2:
        "valueCodeableConcept" : { CodeableConcept } // C? R! Value of extension
        "valueCanonical" : "<canonical>", // C? R! Value of extension
      }
    ],
    "modifierExtension" : [{ Extension }], // C?Extensions that cannot be ignored even if unrecognized
    "path" : "<string>", // C? R! Path of the element in the hierarchy of elements
    "sliceName" : "<string>", // C?Name for this particular element (in a set of slices)
    "sliceIsConstraining" : <boolean>, // C?If this slice definition constrains an inherited slice definition (or not)
    "label" : "<string>", // C?Name for element to display with or prompt for element
    "code" : [{ Coding }], // C?Corresponding codes in terminologies
    "definition" : "<markdown>", // C?Full formal definition as narrative text
    "comment" : "<markdown>", // C?Comments about the use of this element
    "requirements" : "<markdown>", // C?Why this resource has been created
    "alias" : ["<string>"], // C?Other names
    "min" : "<unsignedInt>", // C?Minimum Cardinality
    "max" : "<string>", // C?Maximum Cardinality (a number or *)
    "base" : { Element }, // C?Base definition information for tools
    "type" : [{ Element }], // C?Data type and Profile for this element
// value[x]: Specified value if missing from instance. One of these 50:
    "defaultValueBase64Binary" : "<base64Binary>", // C?Specified value if missing from instance
    "defaultValueBoolean" : <boolean>, // C?Specified value if missing from instance
    "defaultValueCanonical" : "<canonical>", // C?Specified value if missing from instance
    "defaultValueCode" : "<code>", // C?Specified value if missing from instance
    "defaultValueDate" : "<date>", // C?Specified value if missing from instance
    "defaultValueDateTime" : "<dateTime>", // C?Specified value if missing from instance
    "defaultValueDecimal" : <decimal>, // C?Specified value if missing from instance
    "defaultValueId" : "<id>", // C?Specified value if missing from instance
    "defaultValueInstant" : "<instant>", // C?Specified value if missing from instance
    "defaultValueInteger" : <integer>, // C?Specified value if missing from instance
    "defaultValueMarkdown" : "<markdown>", // C?Specified value if missing from instance
    "defaultValueOid" : "<oid>", // C?Specified value if missing from instance
    "defaultValuePositiveInt" : "<positiveInt>", // C?Specified value if missing from instance
    "defaultValueString" : "<string>", // C?Specified value if missing from instance
    "defaultValueTime" : "<time>", // C?Specified value if missing from instance
    "defaultValueUnsignedInt" : "<unsignedInt>", // C?Specified value if missing from instance
    "defaultValueUri" : "<uri>", // C?Specified value if missing from instance
    "defaultValueUrl" : "<url>", // C?Specified value if missing from instance
    "defaultValueUuid" : "<uuid>" // C?Specified value if missing from instance
    "defaultValueAddress" : { Address }, // C?Specified value if missing from instance
    "defaultValueAge" : { Age }, // C?Specified value if missing from instance
    "defaultValueAnnotation" : { Annotation }, // C?Specified value if missing from instance
    "defaultValueAttachment" : { Attachment }, // C?Specified value if missing from instance
    "defaultValueCodeableConcept" : { CodeableConcept }, // C?Specified value if missing from instance
    "defaultValueCoding" : { Coding }, // C?Specified value if missing from instance
    "defaultValueContactPoint" : { ContactPoint }, // C?Specified value if missing from instance
    "defaultValueCount" : { Count }, // C?Specified value if missing from instance
    "defaultValueDistance" : { Distance }, // C?Specified value if missing from instance
    "defaultValueDuration" : { Duration }, // C?Specified value if missing from instance
    "defaultValueHumanName" : { HumanName }, // C?Specified value if missing from instance
    "defaultValueIdentifier" : { Identifier }, // C?Specified value if missing from instance
    "defaultValueMoney" : { Money }, // C?Specified value if missing from instance
    "defaultValuePeriod" : { Period }, // C?Specified value if missing from instance
    "defaultValueQuantity" : { Quantity }, // C?Specified value if missing from instance
    "defaultValueRange" : { Range }, // C?Specified value if missing from instance
    "defaultValueRatio" : { Ratio }, // C?Specified value if missing from instance
    "defaultValueReference" : { Reference }, // C?Specified value if missing from instance
    "defaultValueSampledData" : { SampledData }, // C?Specified value if missing from instance
    "defaultValueSignature" : { Signature }, // C?Specified value if missing from instance
    "defaultValueTiming" : { Timing }, // C?Specified value if missing from instance
    "defaultValueContactDetail" : { ContactDetail }, // C?Specified value if missing from instance
    "defaultValueContributor" : { Contributor }, // C?Specified value if missing from instance
    "defaultValueDataRequirement" : { DataRequirement }, // C?Specified value if missing from instance
    "defaultValueExpression" : { Expression }, // C?Specified value if missing from instance
    "defaultValueParameterDefinition" : { ParameterDefinition }, // C?Specified value if missing from instance
    "defaultValueRelatedArtifact" : { RelatedArtifact }, // C?Specified value if missing from instance
    "defaultValueTriggerDefinition" : { TriggerDefinition }, // C?Specified value if missing from instance
    "defaultValueUsageContext" : { UsageContext }, // C?Specified value if missing from instance
    "defaultValueDosage" : { Dosage }, // C?Specified value if missing from instance
    "defaultValueMeta" : { Meta }, // C?Specified value if missing from instance
    "meaningWhenMissing" : "<markdown>", // C?Implicit meaning when this element is missing
    "orderMeaning" : "<string>", // C?What the order of the elements means
// value[x]: Value must be exactly this. One of these 50:
// value[x]: Value must have at least these property values. One of these 50:
    "example" : [{ Element }], // C?Example value (as defined for type)
// value[x]: Minimum Allowed Value (for some types). One of these 9:
    "minValueDate" : "<date>", // C?Minimum Allowed Value (for some types)
    "minValueDateTime" : "<dateTime>", // C?Minimum Allowed Value (for some types)
    "minValueInstant" : "<instant>", // C?Minimum Allowed Value (for some types)
    "minValueTime" : "<time>", // C?Minimum Allowed Value (for some types)
    "minValueDecimal" : <decimal>, // C?Minimum Allowed Value (for some types)
    "minValueInteger" : <integer>, // C?Minimum Allowed Value (for some types)
    "minValuePositiveInt" : "<positiveInt>", // C?Minimum Allowed Value (for some types)
    "minValueUnsignedInt" : "<unsignedInt>", // C?Minimum Allowed Value (for some types)
    "minValueQuantity" : { Quantity }, // C?Minimum Allowed Value (for some types)
// value[x]: Maximum Allowed Value (for some types). One of these 9:
    "maxValueDate" : "<date>", // C?Maximum Allowed Value (for some types)
    "maxValueDateTime" : "<dateTime>", // C?Maximum Allowed Value (for some types)
    "maxValueInstant" : "<instant>", // C?Maximum Allowed Value (for some types)
    "maxValueTime" : "<time>", // C?Maximum Allowed Value (for some types)
    "maxValueDecimal" : <decimal>, // C?Maximum Allowed Value (for some types)
    "maxValueInteger" : <integer>, // C?Maximum Allowed Value (for some types)
    "maxValuePositiveInt" : "<positiveInt>", // C?Maximum Allowed Value (for some types)
    "maxValueUnsignedInt" : "<unsignedInt>", // C?Maximum Allowed Value (for some types)
    "maxValueQuantity" : { Quantity }, // C?Maximum Allowed Value (for some types)
    "maxLength" : <integer>, // C?Max length for strings
    "condition" : ["<id>"], // C?Reference to invariant about presence
    "constraint" : [{ Element }], // C?Condition that must evaluate to true
    "mustSupport" : <boolean>, // C?If the element must be supported
    "isModifierReason" : "<string>", // C?Reason that this element is marked as a modifier
    "binding" : { Element }, // C?ValueSet details if this is coded
    "mapping" : [{ Element }], // C?Map element to another set of definitions
  }

Alternate definitions: Master Definition (XML, JSON), Schematron

Terminology Bindings

Path	Name	Conformance	ValueSet
ElementDefinition.extension.value[x]	UCUM Codes	required	UCUM Codes
ElementDefinition.code	LOINC Codes	example	LOINC Codes
ElementDefinition.slicing.discriminator.type	DiscriminatorType	required	DiscriminatorType
ElementDefinition.slicing.rules	SlicingRules	required	SlicingRules
ElementDefinition.type.code	FHIRDefinedType	extensible	FHIRDefinedType
ElementDefinition.type.versioning	ReferenceVersionRules	required	ReferenceVersionRules
ElementDefinition.constraint.severity	ConstraintSeverity	required	ConstraintSeverity
ElementDefinition.binding.strength	BindingStrength	required	BindingStrength
ElementDefinition.mapping.language	MimeType	required	MimeType

Constraints

Rule Warning Rule

Id	Path	Details	Requirements
eld-3	ElementDefinition.max	Max SHALL be a number or "" Expression: empty() or ($this = '') or (toInteger() >= 0)
eld-21	ElementDefinition.constraint	Constraints should have an expression or else validators will not be able to enforce them Expression: expression.exists()
eld-12	ElementDefinition.binding	ValueSet SHALL start with http:// or https:// or urn: Expression: valueSet.exists() implies (valueSet.startsWith('http:') or valueSet.startsWith('https') or valueSet.startsWith('urn:'))