This page is part of the FHIR Specification (v3.0.2: STU 3). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R5 R4B R4 R3 R2

2.32.0 Element Definition

FHIR Infrastructure

Work Group

Maturity Level: 5

Ballot Status: Trial Use

The definition of an element in a resource or an extension. The definition includes:

Path (name), Cardinality, and data type
Definitions, usage notes, and requirements
Default or fixed values
Constraints, Length limits, and other usage rules
Terminology Binding
Mappings to other specifications
Structural Usage Information such as Slicing

The ElementDefinition type is the core of the FHIR metadata layer, and is closely (conceptually) aligned to ISO 11179. The DataElement resource is a packaging wrapper around the ElementDefinition type. All the data elements defined in this specification are published as a collection of data elements (XML or JSON).

Structure

Name	Flags	Card.	Type	Description & Constraints
ElementDefinition	ΣI		Element	Definition of an element in a resource or extension + Min <= Max + if the element definition has a contentReference, it cannot have type, defaultValue, fixed, pattern, example, minValue, maxValue, maxLength, or binding + Pattern may only be specified if there is one type + Fixed value may only be specified if there is one type + Binding can only be present for coded elements, string, and uri + Pattern and value are mutually exclusive + Constraints must be unique by key + Types must be unique by the combination of code and profile + sliceName must be composed of proper tokens separated by "/" + default value and meaningWhenMissing are mutually exclusive Elements defined in Ancestors: id, extension
path	Σ	1..1	string	Path of the element in the hierarchy of elements
representation	Σ	0..*	code	xmlAttr \| xmlText \| typeAttr \| cdaText \| xhtml PropertyRepresentation (Required)
sliceName	Σ	0..1	string	Name for this particular element (in a set of slices)
label	Σ	0..1	string	Name for element to display with or prompt for element
code	Σ	0..*	Coding	Corresponding codes in terminologies LOINC Codes (Example)
slicing	ΣI	0..1	Element	This element is sliced - slices follow + If there are no discriminators, there must be a definition
discriminator	Σ	0..*	Element	Element values that are used to distinguish the slices
type	Σ	1..1	code	value \| exists \| pattern \| type \| profile DiscriminatorType (Required)
path	Σ	1..1	string	Path to element value
description	ΣI	0..1	string	Text description of how slicing works (or not)
ordered	Σ	0..1	boolean	If elements must be in same order as slices
rules	Σ	1..1	code	closed \| open \| openAtEnd SlicingRules (Required)
short	Σ	0..1	string	Concise definition for space-constrained presentation
definition	Σ	0..1	markdown	Full formal definition as narrative text
comment	Σ	0..1	markdown	Comments about the use of this element
requirements	Σ	0..1	markdown	Why this resource has been created
alias	Σ	0..*	string	Other names
min	ΣI	0..1	unsignedInt	Minimum Cardinality
max	ΣI	0..1	string	Maximum Cardinality (a number or ) + Max SHALL be a number or ""
base	Σ	0..1	Element	Base definition information for tools
path	Σ	1..1	string	Path that identifies the base element
min	Σ	1..1	unsignedInt	Min cardinality of the base element
max	Σ	1..1	string	Max cardinality of the base element
contentReference	ΣI	0..1	uri	Reference to definition of content for the element
type	ΣI	0..*	Element	Data type and Profile for this element + Aggregation may only be specified if one of the allowed types for the element is a resource
code	Σ	1..1	uri	Data type or Resource (reference to definition) FHIRDefinedType (Extensible)
profile	Σ	0..1	uri	Profile (StructureDefinition) to apply (or IG)
targetProfile	Σ	0..1	uri	Profile (StructureDefinition) to apply to reference target (or IG)
aggregation	ΣI	0..*	code	contained \| referenced \| bundled - how aggregated AggregationMode (Required)
versioning	Σ	0..1	code	either \| independent \| specific ReferenceVersionRules (Required)
defaultValue[x]	ΣI	0..1	*	Specified value if missing from instance
meaningWhenMissing	ΣI	0..1	markdown	Implicit meaning when this element is missing
orderMeaning	Σ	0..1	string	What the order of the elements means
fixed[x]	ΣI	0..1	*	Value must be exactly this
pattern[x]	ΣI	0..1	*	Value must have at least these property values
example	Σ	0..*	Element	Example value (as defined for type)
label	Σ	1..1	string	Describes the purpose of this example
value[x]	Σ	1..1	*	Value of Example (one of allowed types)
minValue[x]	Σ	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]	Σ	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	Σ	0..1	integer	Max length for strings
condition	Σ	0..*	id	Reference to invariant about presence
constraint	Σ	0..*	Element	Condition that must evaluate to true
key	ΣI	1..1	id	Target of 'condition' reference above
requirements	Σ	0..1	string	Why this constraint is necessary or appropriate
severity	Σ	1..1	code	error \| warning ConstraintSeverity (Required)
human	Σ	1..1	string	Human description of constraint
expression	Σ	1..1	string	FHIRPath expression of constraint
xpath	Σ	0..1	string	XPath expression of constraint
source	Σ	0..1	uri	Reference to original source of constraint
mustSupport	Σ	0..1	boolean	If the element must supported
isModifier	Σ	0..1	boolean	If this modifies the meaning of other elements
isSummary	Σ	0..1	boolean	Include when _summary = true?
binding	ΣI	0..1	Element	ValueSet details if this is coded + ValueSet as a URI SHALL start with http:// or https:// or urn:
strength	Σ	1..1	code	required \| extensible \| preferred \| example BindingStrength (Required)
description	ΣI	0..1	string	Human explanation of the value set
valueSet[x]	ΣI	0..1		Source of value set
valueSetUri			uri
valueSetReference			Reference(ValueSet)
mapping	Σ	0..*	Element	Map element to another set of definitions
identity	Σ	1..1	id	Reference to mapping declaration
language	Σ	0..1	code	Computable language of mapping MimeType (Required)
map	Σ	1..1	string	Details of the mapping
comment	Σ	0..1	string	Comments about the mapping or its use
Documentation for this format

UML Diagram (Legend)

XML Template

<[name] xmlns="http://hl7.org/fhir"> 
 <!-- from Element: extension -->
 <path value="[string]"/><!-- 1..1 Path of the element in the hierarchy of elements -->
 <representation value="[code]"/><!-- 0..* xmlAttr | xmlText | typeAttr | cdaText | xhtml -->
 <sliceName value="[string]"/><!-- 0..1 Name for this particular element (in a set of slices) -->
 <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..1 This element is sliced - slices follow -->
  <discriminator>  <!-- 0..* Element values that are used to distinguish the slices -->
   <type value="[code]"/><!-- 1..1 value | exists | pattern | type | profile -->
   <path value="[string]"/><!-- 1..1 Path to element value -->
  </discriminator>
  <description value="[string]"/><!--  0..1 Text description of how slicing works (or not) -->
  <ordered value="[boolean]"/><!-- 0..1 If elements must be in same order as slices -->
  <rules value="[code]"/><!-- 1..1 closed | open | openAtEnd -->
 </slicing>
 <short value="[string]"/><!-- 0..1 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 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..1 Reference to definition of content for the element -->
 <type>  <!--  0..* Data type and Profile for this element -->
  <code value="[uri]"/><!-- 1..1 Data type or Resource (reference to definition) -->
  <profile value="[uri]"/><!-- 0..1 Profile (StructureDefinition) to apply (or IG) -->
  <targetProfile value="[uri]"/><!-- 0..1 Profile (StructureDefinition) to apply to reference target (or IG) -->
  <aggregation value="[code]"/><!--  0..* contained | referenced | bundled - how aggregated -->
  <versioning value="[code]"/><!-- 0..1 either | independent | specific -->
 </type>
 <defaultValue[x]><!--  0..1 * 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..1 * Value must be exactly this --></fixed[x]>
 <pattern[x]><!--  0..1 * Value must have at least these property values --></pattern[x]>
 <example>  <!-- 0..* Example value (as defined for type) -->
  <label value="[string]"/><!-- 1..1 Describes the purpose of this example -->
  <value[x]><!-- 1..1 * 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..* 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]"/><!-- 1..1 FHIRPath expression of constraint -->
  <xpath value="[string]"/><!-- 0..1 XPath expression of constraint -->
  <source value="[uri]"/><!-- 0..1 Reference to original source of constraint -->
 </constraint>
 <mustSupport value="[boolean]"/><!-- 0..1 If the element must supported -->
 <isModifier value="[boolean]"/><!-- 0..1 If this modifies the meaning of other elements -->
 <isSummary value="[boolean]"/><!-- 0..1 Include when _summary = true? -->
 <binding>  <!--  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[x]><!--  0..1 uri|Reference(ValueSet) Source of value set --></valueSet[x]>
 </binding>
 <mapping>  <!-- 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>
</[name]>

JSON Template

{
  // from Element: extension
  "path" : "<string>", // R!  Path of the element in the hierarchy of elements
  "representation" : ["<code>"], // xmlAttr | xmlText | typeAttr | cdaText | xhtml
  "sliceName" : "<string>", // Name for this particular element (in a set of slices)
  "label" : "<string>", // Name for element to display with or prompt for element
  "code" : [{ Coding }], // Corresponding codes in terminologies
  "slicing" : { // This element is sliced - slices follow
    "discriminator" : [{ // Element values that are used to distinguish the slices
      "type" : "<code>", // R!  value | exists | pattern | type | profile
      "path" : "<string>" // R!  Path to element value
    }],
    "description" : "<string>", // C? Text description of how slicing works (or not)
    "ordered" : <boolean>, // If elements must be in same order as slices
    "rules" : "<code>" // R!  closed | open | openAtEnd
  },
  "short" : "<string>", // Concise definition for space-constrained presentation
  "definition" : "<markdown>", // Full formal definition as narrative text
  "comment" : "<markdown>", // Comments about the use of this element
  "requirements" : "<markdown>", // Why this resource has been created
  "alias" : ["<string>"], // Other names
  "min" : "<unsignedInt>", // C? Minimum Cardinality
  "max" : "<string>", // C? Maximum Cardinality (a number or *)
  "base" : { // Base definition information for tools
    "path" : "<string>", // R!  Path that identifies the base element
    "min" : "<unsignedInt>", // R!  Min cardinality of the base element
    "max" : "<string>" // R!  Max cardinality of the base element
  },
  "contentReference" : "<uri>", // C? Reference to definition of content for the element
  "type" : [{ // C? Data type and Profile for this element
    "code" : "<uri>", // R!  Data type or Resource (reference to definition)
    "profile" : "<uri>", // Profile (StructureDefinition) to apply (or IG)
    "targetProfile" : "<uri>", // Profile (StructureDefinition) to apply to reference target (or IG)
    "aggregation" : ["<code>"], // C? contained | referenced | bundled - how aggregated
    "versioning" : "<code>" // either | independent | specific
  }],
  // defaultValue[x]: Specified value if missing from instance. One of these 23:
  "defaultValueInteger" : <integer>,
  "defaultValueDecimal" : <decimal>,
  "defaultValueDateTime" : "<dateTime>",
  "defaultValueDate" : "<date>",
  "defaultValueInstant" : "<instant>",
  "defaultValueString" : "<string>",
  "defaultValueUri" : "<uri>",
  "defaultValueBoolean" : <boolean>,
  "defaultValueCode" : "<code>",
  "defaultValueBase64Binary" : "<base64Binary>",
  "defaultValueCoding" : { Coding },
  "defaultValueCodeableConcept" : { CodeableConcept },
  "defaultValueAttachment" : { Attachment },
  "defaultValueIdentifier" : { Identifier },
  "defaultValueQuantity" : { Quantity },
  "defaultValueRange" : { Range },
  "defaultValuePeriod" : { Period },
  "defaultValueRatio" : { Ratio },
  "defaultValueHumanName" : { HumanName },
  "defaultValueAddress" : { Address },
  "defaultValueContactPoint" : { ContactPoint },
  "defaultValueSchedule" : { Schedule },
  "defaultValueReference" : { Reference },
  "meaningWhenMissing" : "<markdown>", // C? Implicit meaning when this element is missing
  "orderMeaning" : "<string>", // What the order of the elements means
  // fixed[x]: Value must be exactly this. One of these 23:
  "fixedInteger" : <integer>,
  "fixedDecimal" : <decimal>,
  "fixedDateTime" : "<dateTime>",
  "fixedDate" : "<date>",
  "fixedInstant" : "<instant>",
  "fixedString" : "<string>",
  "fixedUri" : "<uri>",
  "fixedBoolean" : <boolean>,
  "fixedCode" : "<code>",
  "fixedBase64Binary" : "<base64Binary>",
  "fixedCoding" : { Coding },
  "fixedCodeableConcept" : { CodeableConcept },
  "fixedAttachment" : { Attachment },
  "fixedIdentifier" : { Identifier },
  "fixedQuantity" : { Quantity },
  "fixedRange" : { Range },
  "fixedPeriod" : { Period },
  "fixedRatio" : { Ratio },
  "fixedHumanName" : { HumanName },
  "fixedAddress" : { Address },
  "fixedContactPoint" : { ContactPoint },
  "fixedSchedule" : { Schedule },
  "fixedReference" : { Reference },
  // pattern[x]: Value must have at least these property values. One of these 23:
  "patternInteger" : <integer>,
  "patternDecimal" : <decimal>,
  "patternDateTime" : "<dateTime>",
  "patternDate" : "<date>",
  "patternInstant" : "<instant>",
  "patternString" : "<string>",
  "patternUri" : "<uri>",
  "patternBoolean" : <boolean>,
  "patternCode" : "<code>",
  "patternBase64Binary" : "<base64Binary>",
  "patternCoding" : { Coding },
  "patternCodeableConcept" : { CodeableConcept },
  "patternAttachment" : { Attachment },
  "patternIdentifier" : { Identifier },
  "patternQuantity" : { Quantity },
  "patternRange" : { Range },
  "patternPeriod" : { Period },
  "patternRatio" : { Ratio },
  "patternHumanName" : { HumanName },
  "patternAddress" : { Address },
  "patternContactPoint" : { ContactPoint },
  "patternSchedule" : { Schedule },
  "patternReference" : { Reference },
  "example" : [{ // Example value (as defined for type)
    "label" : "<string>", // R!  Describes the purpose of this example
    // value[x]: Value of Example (one of allowed types). One of these 23:
    "valueInteger" : <integer>
    "valueDecimal" : <decimal>
    "valueDateTime" : "<dateTime>"
    "valueDate" : "<date>"
    "valueInstant" : "<instant>"
    "valueString" : "<string>"
    "valueUri" : "<uri>"
    "valueBoolean" : <boolean>
    "valueCode" : "<code>"
    "valueBase64Binary" : "<base64Binary>"
    "valueCoding" : { Coding }
    "valueCodeableConcept" : { CodeableConcept }
    "valueAttachment" : { Attachment }
    "valueIdentifier" : { Identifier }
    "valueQuantity" : { Quantity }
    "valueRange" : { Range }
    "valuePeriod" : { Period }
    "valueRatio" : { Ratio }
    "valueHumanName" : { HumanName }
    "valueAddress" : { Address }
    "valueContactPoint" : { ContactPoint }
    "valueSchedule" : { Schedule }
    "valueReference" : { Reference }
  }],
  // minValue[x]: Minimum Allowed Value (for some types). One of these 9:
  "minValueDate" : "<date>",
  "minValueDateTime" : "<dateTime>",
  "minValueInstant" : "<instant>",
  "minValueTime" : "<time>",
  "minValueDecimal" : <decimal>,
  "minValueInteger" : <integer>,
  "minValuePositiveInt" : "<positiveInt>",
  "minValueUnsignedInt" : "<unsignedInt>",
  "minValueQuantity" : { Quantity },
  // maxValue[x]: Maximum Allowed Value (for some types). One of these 9:
  "maxValueDate" : "<date>",
  "maxValueDateTime" : "<dateTime>",
  "maxValueInstant" : "<instant>",
  "maxValueTime" : "<time>",
  "maxValueDecimal" : <decimal>,
  "maxValueInteger" : <integer>,
  "maxValuePositiveInt" : "<positiveInt>",
  "maxValueUnsignedInt" : "<unsignedInt>",
  "maxValueQuantity" : { Quantity },
  "maxLength" : <integer>, // Max length for strings
  "condition" : ["<id>"], // Reference to invariant about presence
  "constraint" : [{ // Condition that must evaluate to true
    "key" : "<id>", // C? R!  Target of 'condition' reference above
    "requirements" : "<string>", // Why this constraint is necessary or appropriate
    "severity" : "<code>", // R!  error | warning
    "human" : "<string>", // R!  Human description of constraint
    "expression" : "<string>", // R!  FHIRPath expression of constraint
    "xpath" : "<string>", // XPath expression of constraint
    "source" : "<uri>" // Reference to original source of constraint
  }],
  "mustSupport" : <boolean>, // If the element must supported
  "isModifier" : <boolean>, // If this modifies the meaning of other elements
  "isSummary" : <boolean>, // Include when _summary = true?
  "binding" : { // C? ValueSet details if this is coded
    "strength" : "<code>", // R!  required | extensible | preferred | example
    "description" : "<string>", // Human explanation of the value set
    // valueSet[x]: Source of value set. One of these 2:
    "valueSetUri" : "<uri>"
    "valueSetReference" : { Reference(ValueSet) }
  },
  "mapping" : [{ // Map element to another set of definitions
    "identity" : "<id>", // R!  Reference to mapping declaration
    "language" : "<code>", // Computable language of mapping 
    "map" : "<string>", // R!  Details of the mapping
    "comment" : "<string>" // Comments about the mapping or its use
  }]
}

Turtle Template

@prefix fhir: <http://hl7.org/fhir/> .

[
 # from Element: Element.extension
  fhir:ElementDefinition.path [ string ]; # 1..1 Path of the element in the hierarchy of elements
  fhir:ElementDefinition.representation [ code ], ... ; # 0..* xmlAttr | xmlText | typeAttr | cdaText | xhtml
  fhir:ElementDefinition.sliceName [ string ]; # 0..1 Name for this particular element (in a set of slices)
  fhir:ElementDefinition.label [ string ]; # 0..1 Name for element to display with or prompt for element
  fhir:ElementDefinition.code [ Coding ], ... ; # 0..* Corresponding codes in terminologies
  fhir:ElementDefinition.slicing [ # 0..1 This element is sliced - slices follow
    fhir:ElementDefinition.slicing.discriminator [ # 0..* Element values that are used to distinguish the slices
      fhir:ElementDefinition.slicing.discriminator.type [ code ]; # 1..1 value | exists | pattern | type | profile
      fhir:ElementDefinition.slicing.discriminator.path [ string ]; # 1..1 Path to element value
    ], ...;
    fhir:ElementDefinition.slicing.description [ string ]; # 0..1 Text description of how slicing works (or not)
    fhir:ElementDefinition.slicing.ordered [ boolean ]; # 0..1 If elements must be in same order as slices
    fhir:ElementDefinition.slicing.rules [ code ]; # 1..1 closed | open | openAtEnd
  ];
  fhir:ElementDefinition.short [ string ]; # 0..1 Concise definition for space-constrained presentation
  fhir:ElementDefinition.definition [ markdown ]; # 0..1 Full formal definition as narrative text
  fhir:ElementDefinition.comment [ markdown ]; # 0..1 Comments about the use of this element
  fhir:ElementDefinition.requirements [ markdown ]; # 0..1 Why this resource has been created
  fhir:ElementDefinition.alias [ string ], ... ; # 0..* Other names
  fhir:ElementDefinition.min [ unsignedInt ]; # 0..1 Minimum Cardinality
  fhir:ElementDefinition.max [ string ]; # 0..1 Maximum Cardinality (a number or *)
  fhir:ElementDefinition.base [ # 0..1 Base definition information for tools
    fhir:ElementDefinition.base.path [ string ]; # 1..1 Path that identifies the base element
    fhir:ElementDefinition.base.min [ unsignedInt ]; # 1..1 Min cardinality of the base element
    fhir:ElementDefinition.base.max [ string ]; # 1..1 Max cardinality of the base element
  ];
  fhir:ElementDefinition.contentReference [ uri ]; # 0..1 Reference to definition of content for the element
  fhir:ElementDefinition.type [ # 0..* Data type and Profile for this element
    fhir:ElementDefinition.type.code [ uri ]; # 1..1 Data type or Resource (reference to definition)
    fhir:ElementDefinition.type.profile [ uri ]; # 0..1 Profile (StructureDefinition) to apply (or IG)
    fhir:ElementDefinition.type.targetProfile [ uri ]; # 0..1 Profile (StructureDefinition) to apply to reference target (or IG)
    fhir:ElementDefinition.type.aggregation [ code ], ... ; # 0..* contained | referenced | bundled - how aggregated
    fhir:ElementDefinition.type.versioning [ code ]; # 0..1 either | independent | specific
  ], ...;
  # ElementDefinition.defaultValue[x] : 0..1 Specified value if missing from instance. One of these 38
    fhir:ElementDefinition.defaultValueBase64Binary [ base64Binary ]
    fhir:ElementDefinition.defaultValueBoolean [ boolean ]
    fhir:ElementDefinition.defaultValueCode [ code ]
    fhir:ElementDefinition.defaultValueDate [ date ]
    fhir:ElementDefinition.defaultValueDateTime [ dateTime ]
    fhir:ElementDefinition.defaultValueDecimal [ decimal ]
    fhir:ElementDefinition.defaultValueId [ id ]
    fhir:ElementDefinition.defaultValueInstant [ instant ]
    fhir:ElementDefinition.defaultValueInteger [ integer ]
    fhir:ElementDefinition.defaultValueMarkdown [ markdown ]
    fhir:ElementDefinition.defaultValueOid [ oid ]
    fhir:ElementDefinition.defaultValuePositiveInt [ positiveInt ]
    fhir:ElementDefinition.defaultValueString [ string ]
    fhir:ElementDefinition.defaultValueTime [ time ]
    fhir:ElementDefinition.defaultValueUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.defaultValueUri [ uri ]
    fhir:ElementDefinition.defaultValueAddress [ Address ]
    fhir:ElementDefinition.defaultValueAge [ Age ]
    fhir:ElementDefinition.defaultValueAnnotation [ Annotation ]
    fhir:ElementDefinition.defaultValueAttachment [ Attachment ]
    fhir:ElementDefinition.defaultValueCodeableConcept [ CodeableConcept ]
    fhir:ElementDefinition.defaultValueCoding [ Coding ]
    fhir:ElementDefinition.defaultValueContactPoint [ ContactPoint ]
    fhir:ElementDefinition.defaultValueCount [ Count ]
    fhir:ElementDefinition.defaultValueDistance [ Distance ]
    fhir:ElementDefinition.defaultValueDuration [ Duration ]
    fhir:ElementDefinition.defaultValueHumanName [ HumanName ]
    fhir:ElementDefinition.defaultValueIdentifier [ Identifier ]
    fhir:ElementDefinition.defaultValueMoney [ Money ]
    fhir:ElementDefinition.defaultValuePeriod [ Period ]
    fhir:ElementDefinition.defaultValueQuantity [ Quantity ]
    fhir:ElementDefinition.defaultValueRange [ Range ]
    fhir:ElementDefinition.defaultValueRatio [ Ratio ]
    fhir:ElementDefinition.defaultValueReference [ Reference ]
    fhir:ElementDefinition.defaultValueSampledData [ SampledData ]
    fhir:ElementDefinition.defaultValueSignature [ Signature ]
    fhir:ElementDefinition.defaultValueTiming [ Timing ]
    fhir:ElementDefinition.defaultValueMeta [ Meta ]
  fhir:ElementDefinition.meaningWhenMissing [ markdown ]; # 0..1 Implicit meaning when this element is missing
  fhir:ElementDefinition.orderMeaning [ string ]; # 0..1 What the order of the elements means
  # ElementDefinition.fixed[x] : 0..1 Value must be exactly this. One of these 38
    fhir:ElementDefinition.fixedBase64Binary [ base64Binary ]
    fhir:ElementDefinition.fixedBoolean [ boolean ]
    fhir:ElementDefinition.fixedCode [ code ]
    fhir:ElementDefinition.fixedDate [ date ]
    fhir:ElementDefinition.fixedDateTime [ dateTime ]
    fhir:ElementDefinition.fixedDecimal [ decimal ]
    fhir:ElementDefinition.fixedId [ id ]
    fhir:ElementDefinition.fixedInstant [ instant ]
    fhir:ElementDefinition.fixedInteger [ integer ]
    fhir:ElementDefinition.fixedMarkdown [ markdown ]
    fhir:ElementDefinition.fixedOid [ oid ]
    fhir:ElementDefinition.fixedPositiveInt [ positiveInt ]
    fhir:ElementDefinition.fixedString [ string ]
    fhir:ElementDefinition.fixedTime [ time ]
    fhir:ElementDefinition.fixedUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.fixedUri [ uri ]
    fhir:ElementDefinition.fixedAddress [ Address ]
    fhir:ElementDefinition.fixedAge [ Age ]
    fhir:ElementDefinition.fixedAnnotation [ Annotation ]
    fhir:ElementDefinition.fixedAttachment [ Attachment ]
    fhir:ElementDefinition.fixedCodeableConcept [ CodeableConcept ]
    fhir:ElementDefinition.fixedCoding [ Coding ]
    fhir:ElementDefinition.fixedContactPoint [ ContactPoint ]
    fhir:ElementDefinition.fixedCount [ Count ]
    fhir:ElementDefinition.fixedDistance [ Distance ]
    fhir:ElementDefinition.fixedDuration [ Duration ]
    fhir:ElementDefinition.fixedHumanName [ HumanName ]
    fhir:ElementDefinition.fixedIdentifier [ Identifier ]
    fhir:ElementDefinition.fixedMoney [ Money ]
    fhir:ElementDefinition.fixedPeriod [ Period ]
    fhir:ElementDefinition.fixedQuantity [ Quantity ]
    fhir:ElementDefinition.fixedRange [ Range ]
    fhir:ElementDefinition.fixedRatio [ Ratio ]
    fhir:ElementDefinition.fixedReference [ Reference ]
    fhir:ElementDefinition.fixedSampledData [ SampledData ]
    fhir:ElementDefinition.fixedSignature [ Signature ]
    fhir:ElementDefinition.fixedTiming [ Timing ]
    fhir:ElementDefinition.fixedMeta [ Meta ]
  # ElementDefinition.pattern[x] : 0..1 Value must have at least these property values. One of these 38
    fhir:ElementDefinition.patternBase64Binary [ base64Binary ]
    fhir:ElementDefinition.patternBoolean [ boolean ]
    fhir:ElementDefinition.patternCode [ code ]
    fhir:ElementDefinition.patternDate [ date ]
    fhir:ElementDefinition.patternDateTime [ dateTime ]
    fhir:ElementDefinition.patternDecimal [ decimal ]
    fhir:ElementDefinition.patternId [ id ]
    fhir:ElementDefinition.patternInstant [ instant ]
    fhir:ElementDefinition.patternInteger [ integer ]
    fhir:ElementDefinition.patternMarkdown [ markdown ]
    fhir:ElementDefinition.patternOid [ oid ]
    fhir:ElementDefinition.patternPositiveInt [ positiveInt ]
    fhir:ElementDefinition.patternString [ string ]
    fhir:ElementDefinition.patternTime [ time ]
    fhir:ElementDefinition.patternUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.patternUri [ uri ]
    fhir:ElementDefinition.patternAddress [ Address ]
    fhir:ElementDefinition.patternAge [ Age ]
    fhir:ElementDefinition.patternAnnotation [ Annotation ]
    fhir:ElementDefinition.patternAttachment [ Attachment ]
    fhir:ElementDefinition.patternCodeableConcept [ CodeableConcept ]
    fhir:ElementDefinition.patternCoding [ Coding ]
    fhir:ElementDefinition.patternContactPoint [ ContactPoint ]
    fhir:ElementDefinition.patternCount [ Count ]
    fhir:ElementDefinition.patternDistance [ Distance ]
    fhir:ElementDefinition.patternDuration [ Duration ]
    fhir:ElementDefinition.patternHumanName [ HumanName ]
    fhir:ElementDefinition.patternIdentifier [ Identifier ]
    fhir:ElementDefinition.patternMoney [ Money ]
    fhir:ElementDefinition.patternPeriod [ Period ]
    fhir:ElementDefinition.patternQuantity [ Quantity ]
    fhir:ElementDefinition.patternRange [ Range ]
    fhir:ElementDefinition.patternRatio [ Ratio ]
    fhir:ElementDefinition.patternReference [ Reference ]
    fhir:ElementDefinition.patternSampledData [ SampledData ]
    fhir:ElementDefinition.patternSignature [ Signature ]
    fhir:ElementDefinition.patternTiming [ Timing ]
    fhir:ElementDefinition.patternMeta [ Meta ]
  fhir:ElementDefinition.example [ # 0..* Example value (as defined for type)
    fhir:ElementDefinition.example.label [ string ]; # 1..1 Describes the purpose of this example
    # ElementDefinition.example.value[x] : 1..1 Value of Example (one of allowed types). One of these 38
      fhir:ElementDefinition.example.valueBase64Binary [ base64Binary ]
      fhir:ElementDefinition.example.valueBoolean [ boolean ]
      fhir:ElementDefinition.example.valueCode [ code ]
      fhir:ElementDefinition.example.valueDate [ date ]
      fhir:ElementDefinition.example.valueDateTime [ dateTime ]
      fhir:ElementDefinition.example.valueDecimal [ decimal ]
      fhir:ElementDefinition.example.valueId [ id ]
      fhir:ElementDefinition.example.valueInstant [ instant ]
      fhir:ElementDefinition.example.valueInteger [ integer ]
      fhir:ElementDefinition.example.valueMarkdown [ markdown ]
      fhir:ElementDefinition.example.valueOid [ oid ]
      fhir:ElementDefinition.example.valuePositiveInt [ positiveInt ]
      fhir:ElementDefinition.example.valueString [ string ]
      fhir:ElementDefinition.example.valueTime [ time ]
      fhir:ElementDefinition.example.valueUnsignedInt [ unsignedInt ]
      fhir:ElementDefinition.example.valueUri [ uri ]
      fhir:ElementDefinition.example.valueAddress [ Address ]
      fhir:ElementDefinition.example.valueAge [ Age ]
      fhir:ElementDefinition.example.valueAnnotation [ Annotation ]
      fhir:ElementDefinition.example.valueAttachment [ Attachment ]
      fhir:ElementDefinition.example.valueCodeableConcept [ CodeableConcept ]
      fhir:ElementDefinition.example.valueCoding [ Coding ]
      fhir:ElementDefinition.example.valueContactPoint [ ContactPoint ]
      fhir:ElementDefinition.example.valueCount [ Count ]
      fhir:ElementDefinition.example.valueDistance [ Distance ]
      fhir:ElementDefinition.example.valueDuration [ Duration ]
      fhir:ElementDefinition.example.valueHumanName [ HumanName ]
      fhir:ElementDefinition.example.valueIdentifier [ Identifier ]
      fhir:ElementDefinition.example.valueMoney [ Money ]
      fhir:ElementDefinition.example.valuePeriod [ Period ]
      fhir:ElementDefinition.example.valueQuantity [ Quantity ]
      fhir:ElementDefinition.example.valueRange [ Range ]
      fhir:ElementDefinition.example.valueRatio [ Ratio ]
      fhir:ElementDefinition.example.valueReference [ Reference ]
      fhir:ElementDefinition.example.valueSampledData [ SampledData ]
      fhir:ElementDefinition.example.valueSignature [ Signature ]
      fhir:ElementDefinition.example.valueTiming [ Timing ]
      fhir:ElementDefinition.example.valueMeta [ Meta ]
  ], ...;
  # ElementDefinition.minValue[x] : 0..1 Minimum Allowed Value (for some types). One of these 9
    fhir:ElementDefinition.minValueDate [ date ]
    fhir:ElementDefinition.minValueDateTime [ dateTime ]
    fhir:ElementDefinition.minValueInstant [ instant ]
    fhir:ElementDefinition.minValueTime [ time ]
    fhir:ElementDefinition.minValueDecimal [ decimal ]
    fhir:ElementDefinition.minValueInteger [ integer ]
    fhir:ElementDefinition.minValuePositiveInt [ positiveInt ]
    fhir:ElementDefinition.minValueUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.minValueQuantity [ Quantity ]
  # ElementDefinition.maxValue[x] : 0..1 Maximum Allowed Value (for some types). One of these 9
    fhir:ElementDefinition.maxValueDate [ date ]
    fhir:ElementDefinition.maxValueDateTime [ dateTime ]
    fhir:ElementDefinition.maxValueInstant [ instant ]
    fhir:ElementDefinition.maxValueTime [ time ]
    fhir:ElementDefinition.maxValueDecimal [ decimal ]
    fhir:ElementDefinition.maxValueInteger [ integer ]
    fhir:ElementDefinition.maxValuePositiveInt [ positiveInt ]
    fhir:ElementDefinition.maxValueUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.maxValueQuantity [ Quantity ]
  fhir:ElementDefinition.maxLength [ integer ]; # 0..1 Max length for strings
  fhir:ElementDefinition.condition [ id ], ... ; # 0..* Reference to invariant about presence
  fhir:ElementDefinition.constraint [ # 0..* Condition that must evaluate to true
    fhir:ElementDefinition.constraint.key [ id ]; # 1..1 Target of 'condition' reference above
    fhir:ElementDefinition.constraint.requirements [ string ]; # 0..1 Why this constraint is necessary or appropriate
    fhir:ElementDefinition.constraint.severity [ code ]; # 1..1 error | warning
    fhir:ElementDefinition.constraint.human [ string ]; # 1..1 Human description of constraint
    fhir:ElementDefinition.constraint.expression [ string ]; # 1..1 FHIRPath expression of constraint
    fhir:ElementDefinition.constraint.xpath [ string ]; # 0..1 XPath expression of constraint
    fhir:ElementDefinition.constraint.source [ uri ]; # 0..1 Reference to original source of constraint
  ], ...;
  fhir:ElementDefinition.mustSupport [ boolean ]; # 0..1 If the element must supported
  fhir:ElementDefinition.isModifier [ boolean ]; # 0..1 If this modifies the meaning of other elements
  fhir:ElementDefinition.isSummary [ boolean ]; # 0..1 Include when _summary = true?
  fhir:ElementDefinition.binding [ # 0..1 ValueSet details if this is coded
    fhir:ElementDefinition.binding.strength [ code ]; # 1..1 required | extensible | preferred | example
    fhir:ElementDefinition.binding.description [ string ]; # 0..1 Human explanation of the value set
    # ElementDefinition.binding.valueSet[x] : 0..1 Source of value set. One of these 2
      fhir:ElementDefinition.binding.valueSetUri [ uri ]
      fhir:ElementDefinition.binding.valueSetReference [ Reference(ValueSet) ]
  ];
  fhir:ElementDefinition.mapping [ # 0..* Map element to another set of definitions
    fhir:ElementDefinition.mapping.identity [ id ]; # 1..1 Reference to mapping declaration
    fhir:ElementDefinition.mapping.language [ code ]; # 0..1 Computable language of mapping
    fhir:ElementDefinition.mapping.map [ string ]; # 1..1 Details of the mapping
    fhir:ElementDefinition.mapping.comment [ string ]; # 0..1 Comments about the mapping or its use
  ], ...;
]

Changes since DSTU2

ElementDefinition

ElementDefinition.representation

Add Codes xmlText, typeAttr, cdaText, xhtml

ElementDefinition.sliceName

Renamed from name to sliceName

ElementDefinition.slicing.discriminator

Type changed from string to Element

ElementDefinition.slicing.discriminator.type

Added Element

ElementDefinition.slicing.discriminator.path

Added Element

ElementDefinition.comment

Renamed from comments to comment

ElementDefinition.min

Type changed from integer to unsignedInt

ElementDefinition.base.min

Type changed from integer to unsignedInt

ElementDefinition.contentReference

Renamed from nameReference to contentReference
Type changed from string to uri

ElementDefinition.type.code

Type changed from code to uri
Change binding strength from required to extensible

ElementDefinition.type.profile

Max Cardinality changed from * to 1

ElementDefinition.type.targetProfile

Added Element

ElementDefinition.type.versioning

Added Element

ElementDefinition.defaultValue[x]

Add Age, Add Count, Add Distance, Add Duration, Add Money

ElementDefinition.orderMeaning

Added Element

ElementDefinition.fixed[x]

Add Age, Add Count, Add Distance, Add Duration, Add Money

ElementDefinition.pattern[x]

Add Age, Add Count, Add Distance, Add Duration, Add Money

ElementDefinition.example

Renamed from example[x] to example
Max Cardinality changed from 1 to *
Remove boolean, Remove integer, Remove decimal, Remove base64Binary, Remove instant, Remove string, Remove uri, Remove date, Remove dateTime, Remove time, Remove code, Remove oid, Remove id, Remove unsignedInt, Remove positiveInt, Remove markdown, Remove Annotation, Remove Attachment, Remove Identifier, Remove CodeableConcept, Remove Coding, Remove Quantity, Remove Range, Remove Period, Remove Ratio, Remove SampledData, Remove Signature, Remove HumanName, Remove Address, Remove ContactPoint, Remove Timing, Remove Reference, Remove Meta

ElementDefinition.example.label

Added Element

ElementDefinition.example.value[x]

Added Element

ElementDefinition.minValue[x]

Remove boolean, Remove base64Binary, Remove string, Remove uri, Remove code, Remove oid, Remove id, Remove markdown, Remove Annotation, Remove Attachment, Remove Identifier, Remove CodeableConcept, Remove Coding, Remove Range, Remove Period, Remove Ratio, Remove SampledData, Remove Signature, Remove HumanName, Remove Address, Remove ContactPoint, Remove Timing, Remove Reference, Remove Meta

ElementDefinition.maxValue[x]

Remove boolean, Remove base64Binary, Remove string, Remove uri, Remove code, Remove oid, Remove id, Remove markdown, Remove Annotation, Remove Attachment, Remove Identifier, Remove CodeableConcept, Remove Coding, Remove Range, Remove Period, Remove Ratio, Remove SampledData, Remove Signature, Remove HumanName, Remove Address, Remove ContactPoint, Remove Timing, Remove Reference, Remove Meta

ElementDefinition.constraint.expression

Added Element

ElementDefinition.constraint.xpath

Min Cardinality changed from 1 to 0

ElementDefinition.constraint.source

Added Element

ElementDefinition.mapping.comment

Added Element

See the Full Difference for further information

Structure

Name	Flags	Card.	Type	Description & Constraints
ElementDefinition	ΣI		Element	Definition of an element in a resource or extension + Min <= Max + if the element definition has a contentReference, it cannot have type, defaultValue, fixed, pattern, example, minValue, maxValue, maxLength, or binding + Pattern may only be specified if there is one type + Fixed value may only be specified if there is one type + Binding can only be present for coded elements, string, and uri + Pattern and value are mutually exclusive + Constraints must be unique by key + Types must be unique by the combination of code and profile + sliceName must be composed of proper tokens separated by "/" + default value and meaningWhenMissing are mutually exclusive Elements defined in Ancestors: id, extension
path	Σ	1..1	string	Path of the element in the hierarchy of elements
representation	Σ	0..*	code	xmlAttr \| xmlText \| typeAttr \| cdaText \| xhtml PropertyRepresentation (Required)
sliceName	Σ	0..1	string	Name for this particular element (in a set of slices)
label	Σ	0..1	string	Name for element to display with or prompt for element
code	Σ	0..*	Coding	Corresponding codes in terminologies LOINC Codes (Example)
slicing	ΣI	0..1	Element	This element is sliced - slices follow + If there are no discriminators, there must be a definition
discriminator	Σ	0..*	Element	Element values that are used to distinguish the slices
type	Σ	1..1	code	value \| exists \| pattern \| type \| profile DiscriminatorType (Required)
path	Σ	1..1	string	Path to element value
description	ΣI	0..1	string	Text description of how slicing works (or not)
ordered	Σ	0..1	boolean	If elements must be in same order as slices
rules	Σ	1..1	code	closed \| open \| openAtEnd SlicingRules (Required)
short	Σ	0..1	string	Concise definition for space-constrained presentation
definition	Σ	0..1	markdown	Full formal definition as narrative text
comment	Σ	0..1	markdown	Comments about the use of this element
requirements	Σ	0..1	markdown	Why this resource has been created
alias	Σ	0..*	string	Other names
min	ΣI	0..1	unsignedInt	Minimum Cardinality
max	ΣI	0..1	string	Maximum Cardinality (a number or ) + Max SHALL be a number or ""
base	Σ	0..1	Element	Base definition information for tools
path	Σ	1..1	string	Path that identifies the base element
min	Σ	1..1	unsignedInt	Min cardinality of the base element
max	Σ	1..1	string	Max cardinality of the base element
contentReference	ΣI	0..1	uri	Reference to definition of content for the element
type	ΣI	0..*	Element	Data type and Profile for this element + Aggregation may only be specified if one of the allowed types for the element is a resource
code	Σ	1..1	uri	Data type or Resource (reference to definition) FHIRDefinedType (Extensible)
profile	Σ	0..1	uri	Profile (StructureDefinition) to apply (or IG)
targetProfile	Σ	0..1	uri	Profile (StructureDefinition) to apply to reference target (or IG)
aggregation	ΣI	0..*	code	contained \| referenced \| bundled - how aggregated AggregationMode (Required)
versioning	Σ	0..1	code	either \| independent \| specific ReferenceVersionRules (Required)
defaultValue[x]	ΣI	0..1	*	Specified value if missing from instance
meaningWhenMissing	ΣI	0..1	markdown	Implicit meaning when this element is missing
orderMeaning	Σ	0..1	string	What the order of the elements means
fixed[x]	ΣI	0..1	*	Value must be exactly this
pattern[x]	ΣI	0..1	*	Value must have at least these property values
example	Σ	0..*	Element	Example value (as defined for type)
label	Σ	1..1	string	Describes the purpose of this example
value[x]	Σ	1..1	*	Value of Example (one of allowed types)
minValue[x]	Σ	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]	Σ	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	Σ	0..1	integer	Max length for strings
condition	Σ	0..*	id	Reference to invariant about presence
constraint	Σ	0..*	Element	Condition that must evaluate to true
key	ΣI	1..1	id	Target of 'condition' reference above
requirements	Σ	0..1	string	Why this constraint is necessary or appropriate
severity	Σ	1..1	code	error \| warning ConstraintSeverity (Required)
human	Σ	1..1	string	Human description of constraint
expression	Σ	1..1	string	FHIRPath expression of constraint
xpath	Σ	0..1	string	XPath expression of constraint
source	Σ	0..1	uri	Reference to original source of constraint
mustSupport	Σ	0..1	boolean	If the element must supported
isModifier	Σ	0..1	boolean	If this modifies the meaning of other elements
isSummary	Σ	0..1	boolean	Include when _summary = true?
binding	ΣI	0..1	Element	ValueSet details if this is coded + ValueSet as a URI SHALL start with http:// or https:// or urn:
strength	Σ	1..1	code	required \| extensible \| preferred \| example BindingStrength (Required)
description	ΣI	0..1	string	Human explanation of the value set
valueSet[x]	ΣI	0..1		Source of value set
valueSetUri			uri
valueSetReference			Reference(ValueSet)
mapping	Σ	0..*	Element	Map element to another set of definitions
identity	Σ	1..1	id	Reference to mapping declaration
language	Σ	0..1	code	Computable language of mapping MimeType (Required)
map	Σ	1..1	string	Details of the mapping
comment	Σ	0..1	string	Comments about the mapping or its use
Documentation for this format

UML Diagram (Legend)

XML Template

<[name] xmlns="http://hl7.org/fhir"> 
 <!-- from Element: extension -->
 <path value="[string]"/><!-- 1..1 Path of the element in the hierarchy of elements -->
 <representation value="[code]"/><!-- 0..* xmlAttr | xmlText | typeAttr | cdaText | xhtml -->
 <sliceName value="[string]"/><!-- 0..1 Name for this particular element (in a set of slices) -->
 <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..1 This element is sliced - slices follow -->
  <discriminator>  <!-- 0..* Element values that are used to distinguish the slices -->
   <type value="[code]"/><!-- 1..1 value | exists | pattern | type | profile -->
   <path value="[string]"/><!-- 1..1 Path to element value -->
  </discriminator>
  <description value="[string]"/><!--  0..1 Text description of how slicing works (or not) -->
  <ordered value="[boolean]"/><!-- 0..1 If elements must be in same order as slices -->
  <rules value="[code]"/><!-- 1..1 closed | open | openAtEnd -->
 </slicing>
 <short value="[string]"/><!-- 0..1 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 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..1 Reference to definition of content for the element -->
 <type>  <!--  0..* Data type and Profile for this element -->
  <code value="[uri]"/><!-- 1..1 Data type or Resource (reference to definition) -->
  <profile value="[uri]"/><!-- 0..1 Profile (StructureDefinition) to apply (or IG) -->
  <targetProfile value="[uri]"/><!-- 0..1 Profile (StructureDefinition) to apply to reference target (or IG) -->
  <aggregation value="[code]"/><!--  0..* contained | referenced | bundled - how aggregated -->
  <versioning value="[code]"/><!-- 0..1 either | independent | specific -->
 </type>
 <defaultValue[x]><!--  0..1 * 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..1 * Value must be exactly this --></fixed[x]>
 <pattern[x]><!--  0..1 * Value must have at least these property values --></pattern[x]>
 <example>  <!-- 0..* Example value (as defined for type) -->
  <label value="[string]"/><!-- 1..1 Describes the purpose of this example -->
  <value[x]><!-- 1..1 * 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..* 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]"/><!-- 1..1 FHIRPath expression of constraint -->
  <xpath value="[string]"/><!-- 0..1 XPath expression of constraint -->
  <source value="[uri]"/><!-- 0..1 Reference to original source of constraint -->
 </constraint>
 <mustSupport value="[boolean]"/><!-- 0..1 If the element must supported -->
 <isModifier value="[boolean]"/><!-- 0..1 If this modifies the meaning of other elements -->
 <isSummary value="[boolean]"/><!-- 0..1 Include when _summary = true? -->
 <binding>  <!--  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[x]><!--  0..1 uri|Reference(ValueSet) Source of value set --></valueSet[x]>
 </binding>
 <mapping>  <!-- 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>
</[name]>

JSON Template

{
  // from Element: extension
  "path" : "<string>", // R!  Path of the element in the hierarchy of elements
  "representation" : ["<code>"], // xmlAttr | xmlText | typeAttr | cdaText | xhtml
  "sliceName" : "<string>", // Name for this particular element (in a set of slices)
  "label" : "<string>", // Name for element to display with or prompt for element
  "code" : [{ Coding }], // Corresponding codes in terminologies
  "slicing" : { // This element is sliced - slices follow
    "discriminator" : [{ // Element values that are used to distinguish the slices
      "type" : "<code>", // R!  value | exists | pattern | type | profile
      "path" : "<string>" // R!  Path to element value
    }],
    "description" : "<string>", // C? Text description of how slicing works (or not)
    "ordered" : <boolean>, // If elements must be in same order as slices
    "rules" : "<code>" // R!  closed | open | openAtEnd
  },
  "short" : "<string>", // Concise definition for space-constrained presentation
  "definition" : "<markdown>", // Full formal definition as narrative text
  "comment" : "<markdown>", // Comments about the use of this element
  "requirements" : "<markdown>", // Why this resource has been created
  "alias" : ["<string>"], // Other names
  "min" : "<unsignedInt>", // C? Minimum Cardinality
  "max" : "<string>", // C? Maximum Cardinality (a number or *)
  "base" : { // Base definition information for tools
    "path" : "<string>", // R!  Path that identifies the base element
    "min" : "<unsignedInt>", // R!  Min cardinality of the base element
    "max" : "<string>" // R!  Max cardinality of the base element
  },
  "contentReference" : "<uri>", // C? Reference to definition of content for the element
  "type" : [{ // C? Data type and Profile for this element
    "code" : "<uri>", // R!  Data type or Resource (reference to definition)
    "profile" : "<uri>", // Profile (StructureDefinition) to apply (or IG)
    "targetProfile" : "<uri>", // Profile (StructureDefinition) to apply to reference target (or IG)
    "aggregation" : ["<code>"], // C? contained | referenced | bundled - how aggregated
    "versioning" : "<code>" // either | independent | specific
  }],
  // defaultValue[x]: Specified value if missing from instance. One of these 23:
  "defaultValueInteger" : <integer>,
  "defaultValueDecimal" : <decimal>,
  "defaultValueDateTime" : "<dateTime>",
  "defaultValueDate" : "<date>",
  "defaultValueInstant" : "<instant>",
  "defaultValueString" : "<string>",
  "defaultValueUri" : "<uri>",
  "defaultValueBoolean" : <boolean>,
  "defaultValueCode" : "<code>",
  "defaultValueBase64Binary" : "<base64Binary>",
  "defaultValueCoding" : { Coding },
  "defaultValueCodeableConcept" : { CodeableConcept },
  "defaultValueAttachment" : { Attachment },
  "defaultValueIdentifier" : { Identifier },
  "defaultValueQuantity" : { Quantity },
  "defaultValueRange" : { Range },
  "defaultValuePeriod" : { Period },
  "defaultValueRatio" : { Ratio },
  "defaultValueHumanName" : { HumanName },
  "defaultValueAddress" : { Address },
  "defaultValueContactPoint" : { ContactPoint },
  "defaultValueSchedule" : { Schedule },
  "defaultValueReference" : { Reference },
  "meaningWhenMissing" : "<markdown>", // C? Implicit meaning when this element is missing
  "orderMeaning" : "<string>", // What the order of the elements means
  // fixed[x]: Value must be exactly this. One of these 23:
  "fixedInteger" : <integer>,
  "fixedDecimal" : <decimal>,
  "fixedDateTime" : "<dateTime>",
  "fixedDate" : "<date>",
  "fixedInstant" : "<instant>",
  "fixedString" : "<string>",
  "fixedUri" : "<uri>",
  "fixedBoolean" : <boolean>,
  "fixedCode" : "<code>",
  "fixedBase64Binary" : "<base64Binary>",
  "fixedCoding" : { Coding },
  "fixedCodeableConcept" : { CodeableConcept },
  "fixedAttachment" : { Attachment },
  "fixedIdentifier" : { Identifier },
  "fixedQuantity" : { Quantity },
  "fixedRange" : { Range },
  "fixedPeriod" : { Period },
  "fixedRatio" : { Ratio },
  "fixedHumanName" : { HumanName },
  "fixedAddress" : { Address },
  "fixedContactPoint" : { ContactPoint },
  "fixedSchedule" : { Schedule },
  "fixedReference" : { Reference },
  // pattern[x]: Value must have at least these property values. One of these 23:
  "patternInteger" : <integer>,
  "patternDecimal" : <decimal>,
  "patternDateTime" : "<dateTime>",
  "patternDate" : "<date>",
  "patternInstant" : "<instant>",
  "patternString" : "<string>",
  "patternUri" : "<uri>",
  "patternBoolean" : <boolean>,
  "patternCode" : "<code>",
  "patternBase64Binary" : "<base64Binary>",
  "patternCoding" : { Coding },
  "patternCodeableConcept" : { CodeableConcept },
  "patternAttachment" : { Attachment },
  "patternIdentifier" : { Identifier },
  "patternQuantity" : { Quantity },
  "patternRange" : { Range },
  "patternPeriod" : { Period },
  "patternRatio" : { Ratio },
  "patternHumanName" : { HumanName },
  "patternAddress" : { Address },
  "patternContactPoint" : { ContactPoint },
  "patternSchedule" : { Schedule },
  "patternReference" : { Reference },
  "example" : [{ // Example value (as defined for type)
    "label" : "<string>", // R!  Describes the purpose of this example
    // value[x]: Value of Example (one of allowed types). One of these 23:
    "valueInteger" : <integer>
    "valueDecimal" : <decimal>
    "valueDateTime" : "<dateTime>"
    "valueDate" : "<date>"
    "valueInstant" : "<instant>"
    "valueString" : "<string>"
    "valueUri" : "<uri>"
    "valueBoolean" : <boolean>
    "valueCode" : "<code>"
    "valueBase64Binary" : "<base64Binary>"
    "valueCoding" : { Coding }
    "valueCodeableConcept" : { CodeableConcept }
    "valueAttachment" : { Attachment }
    "valueIdentifier" : { Identifier }
    "valueQuantity" : { Quantity }
    "valueRange" : { Range }
    "valuePeriod" : { Period }
    "valueRatio" : { Ratio }
    "valueHumanName" : { HumanName }
    "valueAddress" : { Address }
    "valueContactPoint" : { ContactPoint }
    "valueSchedule" : { Schedule }
    "valueReference" : { Reference }
  }],
  // minValue[x]: Minimum Allowed Value (for some types). One of these 9:
  "minValueDate" : "<date>",
  "minValueDateTime" : "<dateTime>",
  "minValueInstant" : "<instant>",
  "minValueTime" : "<time>",
  "minValueDecimal" : <decimal>,
  "minValueInteger" : <integer>,
  "minValuePositiveInt" : "<positiveInt>",
  "minValueUnsignedInt" : "<unsignedInt>",
  "minValueQuantity" : { Quantity },
  // maxValue[x]: Maximum Allowed Value (for some types). One of these 9:
  "maxValueDate" : "<date>",
  "maxValueDateTime" : "<dateTime>",
  "maxValueInstant" : "<instant>",
  "maxValueTime" : "<time>",
  "maxValueDecimal" : <decimal>,
  "maxValueInteger" : <integer>,
  "maxValuePositiveInt" : "<positiveInt>",
  "maxValueUnsignedInt" : "<unsignedInt>",
  "maxValueQuantity" : { Quantity },
  "maxLength" : <integer>, // Max length for strings
  "condition" : ["<id>"], // Reference to invariant about presence
  "constraint" : [{ // Condition that must evaluate to true
    "key" : "<id>", // C? R!  Target of 'condition' reference above
    "requirements" : "<string>", // Why this constraint is necessary or appropriate
    "severity" : "<code>", // R!  error | warning
    "human" : "<string>", // R!  Human description of constraint
    "expression" : "<string>", // R!  FHIRPath expression of constraint
    "xpath" : "<string>", // XPath expression of constraint
    "source" : "<uri>" // Reference to original source of constraint
  }],
  "mustSupport" : <boolean>, // If the element must supported
  "isModifier" : <boolean>, // If this modifies the meaning of other elements
  "isSummary" : <boolean>, // Include when _summary = true?
  "binding" : { // C? ValueSet details if this is coded
    "strength" : "<code>", // R!  required | extensible | preferred | example
    "description" : "<string>", // Human explanation of the value set
    // valueSet[x]: Source of value set. One of these 2:
    "valueSetUri" : "<uri>"
    "valueSetReference" : { Reference(ValueSet) }
  },
  "mapping" : [{ // Map element to another set of definitions
    "identity" : "<id>", // R!  Reference to mapping declaration
    "language" : "<code>", // Computable language of mapping 
    "map" : "<string>", // R!  Details of the mapping
    "comment" : "<string>" // Comments about the mapping or its use
  }]
}

Turtle Template

@prefix fhir: <http://hl7.org/fhir/> .

[
 # from Element: Element.extension
  fhir:ElementDefinition.path [ string ]; # 1..1 Path of the element in the hierarchy of elements
  fhir:ElementDefinition.representation [ code ], ... ; # 0..* xmlAttr | xmlText | typeAttr | cdaText | xhtml
  fhir:ElementDefinition.sliceName [ string ]; # 0..1 Name for this particular element (in a set of slices)
  fhir:ElementDefinition.label [ string ]; # 0..1 Name for element to display with or prompt for element
  fhir:ElementDefinition.code [ Coding ], ... ; # 0..* Corresponding codes in terminologies
  fhir:ElementDefinition.slicing [ # 0..1 This element is sliced - slices follow
    fhir:ElementDefinition.slicing.discriminator [ # 0..* Element values that are used to distinguish the slices
      fhir:ElementDefinition.slicing.discriminator.type [ code ]; # 1..1 value | exists | pattern | type | profile
      fhir:ElementDefinition.slicing.discriminator.path [ string ]; # 1..1 Path to element value
    ], ...;
    fhir:ElementDefinition.slicing.description [ string ]; # 0..1 Text description of how slicing works (or not)
    fhir:ElementDefinition.slicing.ordered [ boolean ]; # 0..1 If elements must be in same order as slices
    fhir:ElementDefinition.slicing.rules [ code ]; # 1..1 closed | open | openAtEnd
  ];
  fhir:ElementDefinition.short [ string ]; # 0..1 Concise definition for space-constrained presentation
  fhir:ElementDefinition.definition [ markdown ]; # 0..1 Full formal definition as narrative text
  fhir:ElementDefinition.comment [ markdown ]; # 0..1 Comments about the use of this element
  fhir:ElementDefinition.requirements [ markdown ]; # 0..1 Why this resource has been created
  fhir:ElementDefinition.alias [ string ], ... ; # 0..* Other names
  fhir:ElementDefinition.min [ unsignedInt ]; # 0..1 Minimum Cardinality
  fhir:ElementDefinition.max [ string ]; # 0..1 Maximum Cardinality (a number or *)
  fhir:ElementDefinition.base [ # 0..1 Base definition information for tools
    fhir:ElementDefinition.base.path [ string ]; # 1..1 Path that identifies the base element
    fhir:ElementDefinition.base.min [ unsignedInt ]; # 1..1 Min cardinality of the base element
    fhir:ElementDefinition.base.max [ string ]; # 1..1 Max cardinality of the base element
  ];
  fhir:ElementDefinition.contentReference [ uri ]; # 0..1 Reference to definition of content for the element
  fhir:ElementDefinition.type [ # 0..* Data type and Profile for this element
    fhir:ElementDefinition.type.code [ uri ]; # 1..1 Data type or Resource (reference to definition)
    fhir:ElementDefinition.type.profile [ uri ]; # 0..1 Profile (StructureDefinition) to apply (or IG)
    fhir:ElementDefinition.type.targetProfile [ uri ]; # 0..1 Profile (StructureDefinition) to apply to reference target (or IG)
    fhir:ElementDefinition.type.aggregation [ code ], ... ; # 0..* contained | referenced | bundled - how aggregated
    fhir:ElementDefinition.type.versioning [ code ]; # 0..1 either | independent | specific
  ], ...;
  # ElementDefinition.defaultValue[x] : 0..1 Specified value if missing from instance. One of these 38
    fhir:ElementDefinition.defaultValueBase64Binary [ base64Binary ]
    fhir:ElementDefinition.defaultValueBoolean [ boolean ]
    fhir:ElementDefinition.defaultValueCode [ code ]
    fhir:ElementDefinition.defaultValueDate [ date ]
    fhir:ElementDefinition.defaultValueDateTime [ dateTime ]
    fhir:ElementDefinition.defaultValueDecimal [ decimal ]
    fhir:ElementDefinition.defaultValueId [ id ]
    fhir:ElementDefinition.defaultValueInstant [ instant ]
    fhir:ElementDefinition.defaultValueInteger [ integer ]
    fhir:ElementDefinition.defaultValueMarkdown [ markdown ]
    fhir:ElementDefinition.defaultValueOid [ oid ]
    fhir:ElementDefinition.defaultValuePositiveInt [ positiveInt ]
    fhir:ElementDefinition.defaultValueString [ string ]
    fhir:ElementDefinition.defaultValueTime [ time ]
    fhir:ElementDefinition.defaultValueUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.defaultValueUri [ uri ]
    fhir:ElementDefinition.defaultValueAddress [ Address ]
    fhir:ElementDefinition.defaultValueAge [ Age ]
    fhir:ElementDefinition.defaultValueAnnotation [ Annotation ]
    fhir:ElementDefinition.defaultValueAttachment [ Attachment ]
    fhir:ElementDefinition.defaultValueCodeableConcept [ CodeableConcept ]
    fhir:ElementDefinition.defaultValueCoding [ Coding ]
    fhir:ElementDefinition.defaultValueContactPoint [ ContactPoint ]
    fhir:ElementDefinition.defaultValueCount [ Count ]
    fhir:ElementDefinition.defaultValueDistance [ Distance ]
    fhir:ElementDefinition.defaultValueDuration [ Duration ]
    fhir:ElementDefinition.defaultValueHumanName [ HumanName ]
    fhir:ElementDefinition.defaultValueIdentifier [ Identifier ]
    fhir:ElementDefinition.defaultValueMoney [ Money ]
    fhir:ElementDefinition.defaultValuePeriod [ Period ]
    fhir:ElementDefinition.defaultValueQuantity [ Quantity ]
    fhir:ElementDefinition.defaultValueRange [ Range ]
    fhir:ElementDefinition.defaultValueRatio [ Ratio ]
    fhir:ElementDefinition.defaultValueReference [ Reference ]
    fhir:ElementDefinition.defaultValueSampledData [ SampledData ]
    fhir:ElementDefinition.defaultValueSignature [ Signature ]
    fhir:ElementDefinition.defaultValueTiming [ Timing ]
    fhir:ElementDefinition.defaultValueMeta [ Meta ]
  fhir:ElementDefinition.meaningWhenMissing [ markdown ]; # 0..1 Implicit meaning when this element is missing
  fhir:ElementDefinition.orderMeaning [ string ]; # 0..1 What the order of the elements means
  # ElementDefinition.fixed[x] : 0..1 Value must be exactly this. One of these 38
    fhir:ElementDefinition.fixedBase64Binary [ base64Binary ]
    fhir:ElementDefinition.fixedBoolean [ boolean ]
    fhir:ElementDefinition.fixedCode [ code ]
    fhir:ElementDefinition.fixedDate [ date ]
    fhir:ElementDefinition.fixedDateTime [ dateTime ]
    fhir:ElementDefinition.fixedDecimal [ decimal ]
    fhir:ElementDefinition.fixedId [ id ]
    fhir:ElementDefinition.fixedInstant [ instant ]
    fhir:ElementDefinition.fixedInteger [ integer ]
    fhir:ElementDefinition.fixedMarkdown [ markdown ]
    fhir:ElementDefinition.fixedOid [ oid ]
    fhir:ElementDefinition.fixedPositiveInt [ positiveInt ]
    fhir:ElementDefinition.fixedString [ string ]
    fhir:ElementDefinition.fixedTime [ time ]
    fhir:ElementDefinition.fixedUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.fixedUri [ uri ]
    fhir:ElementDefinition.fixedAddress [ Address ]
    fhir:ElementDefinition.fixedAge [ Age ]
    fhir:ElementDefinition.fixedAnnotation [ Annotation ]
    fhir:ElementDefinition.fixedAttachment [ Attachment ]
    fhir:ElementDefinition.fixedCodeableConcept [ CodeableConcept ]
    fhir:ElementDefinition.fixedCoding [ Coding ]
    fhir:ElementDefinition.fixedContactPoint [ ContactPoint ]
    fhir:ElementDefinition.fixedCount [ Count ]
    fhir:ElementDefinition.fixedDistance [ Distance ]
    fhir:ElementDefinition.fixedDuration [ Duration ]
    fhir:ElementDefinition.fixedHumanName [ HumanName ]
    fhir:ElementDefinition.fixedIdentifier [ Identifier ]
    fhir:ElementDefinition.fixedMoney [ Money ]
    fhir:ElementDefinition.fixedPeriod [ Period ]
    fhir:ElementDefinition.fixedQuantity [ Quantity ]
    fhir:ElementDefinition.fixedRange [ Range ]
    fhir:ElementDefinition.fixedRatio [ Ratio ]
    fhir:ElementDefinition.fixedReference [ Reference ]
    fhir:ElementDefinition.fixedSampledData [ SampledData ]
    fhir:ElementDefinition.fixedSignature [ Signature ]
    fhir:ElementDefinition.fixedTiming [ Timing ]
    fhir:ElementDefinition.fixedMeta [ Meta ]
  # ElementDefinition.pattern[x] : 0..1 Value must have at least these property values. One of these 38
    fhir:ElementDefinition.patternBase64Binary [ base64Binary ]
    fhir:ElementDefinition.patternBoolean [ boolean ]
    fhir:ElementDefinition.patternCode [ code ]
    fhir:ElementDefinition.patternDate [ date ]
    fhir:ElementDefinition.patternDateTime [ dateTime ]
    fhir:ElementDefinition.patternDecimal [ decimal ]
    fhir:ElementDefinition.patternId [ id ]
    fhir:ElementDefinition.patternInstant [ instant ]
    fhir:ElementDefinition.patternInteger [ integer ]
    fhir:ElementDefinition.patternMarkdown [ markdown ]
    fhir:ElementDefinition.patternOid [ oid ]
    fhir:ElementDefinition.patternPositiveInt [ positiveInt ]
    fhir:ElementDefinition.patternString [ string ]
    fhir:ElementDefinition.patternTime [ time ]
    fhir:ElementDefinition.patternUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.patternUri [ uri ]
    fhir:ElementDefinition.patternAddress [ Address ]
    fhir:ElementDefinition.patternAge [ Age ]
    fhir:ElementDefinition.patternAnnotation [ Annotation ]
    fhir:ElementDefinition.patternAttachment [ Attachment ]
    fhir:ElementDefinition.patternCodeableConcept [ CodeableConcept ]
    fhir:ElementDefinition.patternCoding [ Coding ]
    fhir:ElementDefinition.patternContactPoint [ ContactPoint ]
    fhir:ElementDefinition.patternCount [ Count ]
    fhir:ElementDefinition.patternDistance [ Distance ]
    fhir:ElementDefinition.patternDuration [ Duration ]
    fhir:ElementDefinition.patternHumanName [ HumanName ]
    fhir:ElementDefinition.patternIdentifier [ Identifier ]
    fhir:ElementDefinition.patternMoney [ Money ]
    fhir:ElementDefinition.patternPeriod [ Period ]
    fhir:ElementDefinition.patternQuantity [ Quantity ]
    fhir:ElementDefinition.patternRange [ Range ]
    fhir:ElementDefinition.patternRatio [ Ratio ]
    fhir:ElementDefinition.patternReference [ Reference ]
    fhir:ElementDefinition.patternSampledData [ SampledData ]
    fhir:ElementDefinition.patternSignature [ Signature ]
    fhir:ElementDefinition.patternTiming [ Timing ]
    fhir:ElementDefinition.patternMeta [ Meta ]
  fhir:ElementDefinition.example [ # 0..* Example value (as defined for type)
    fhir:ElementDefinition.example.label [ string ]; # 1..1 Describes the purpose of this example
    # ElementDefinition.example.value[x] : 1..1 Value of Example (one of allowed types). One of these 38
      fhir:ElementDefinition.example.valueBase64Binary [ base64Binary ]
      fhir:ElementDefinition.example.valueBoolean [ boolean ]
      fhir:ElementDefinition.example.valueCode [ code ]
      fhir:ElementDefinition.example.valueDate [ date ]
      fhir:ElementDefinition.example.valueDateTime [ dateTime ]
      fhir:ElementDefinition.example.valueDecimal [ decimal ]
      fhir:ElementDefinition.example.valueId [ id ]
      fhir:ElementDefinition.example.valueInstant [ instant ]
      fhir:ElementDefinition.example.valueInteger [ integer ]
      fhir:ElementDefinition.example.valueMarkdown [ markdown ]
      fhir:ElementDefinition.example.valueOid [ oid ]
      fhir:ElementDefinition.example.valuePositiveInt [ positiveInt ]
      fhir:ElementDefinition.example.valueString [ string ]
      fhir:ElementDefinition.example.valueTime [ time ]
      fhir:ElementDefinition.example.valueUnsignedInt [ unsignedInt ]
      fhir:ElementDefinition.example.valueUri [ uri ]
      fhir:ElementDefinition.example.valueAddress [ Address ]
      fhir:ElementDefinition.example.valueAge [ Age ]
      fhir:ElementDefinition.example.valueAnnotation [ Annotation ]
      fhir:ElementDefinition.example.valueAttachment [ Attachment ]
      fhir:ElementDefinition.example.valueCodeableConcept [ CodeableConcept ]
      fhir:ElementDefinition.example.valueCoding [ Coding ]
      fhir:ElementDefinition.example.valueContactPoint [ ContactPoint ]
      fhir:ElementDefinition.example.valueCount [ Count ]
      fhir:ElementDefinition.example.valueDistance [ Distance ]
      fhir:ElementDefinition.example.valueDuration [ Duration ]
      fhir:ElementDefinition.example.valueHumanName [ HumanName ]
      fhir:ElementDefinition.example.valueIdentifier [ Identifier ]
      fhir:ElementDefinition.example.valueMoney [ Money ]
      fhir:ElementDefinition.example.valuePeriod [ Period ]
      fhir:ElementDefinition.example.valueQuantity [ Quantity ]
      fhir:ElementDefinition.example.valueRange [ Range ]
      fhir:ElementDefinition.example.valueRatio [ Ratio ]
      fhir:ElementDefinition.example.valueReference [ Reference ]
      fhir:ElementDefinition.example.valueSampledData [ SampledData ]
      fhir:ElementDefinition.example.valueSignature [ Signature ]
      fhir:ElementDefinition.example.valueTiming [ Timing ]
      fhir:ElementDefinition.example.valueMeta [ Meta ]
  ], ...;
  # ElementDefinition.minValue[x] : 0..1 Minimum Allowed Value (for some types). One of these 9
    fhir:ElementDefinition.minValueDate [ date ]
    fhir:ElementDefinition.minValueDateTime [ dateTime ]
    fhir:ElementDefinition.minValueInstant [ instant ]
    fhir:ElementDefinition.minValueTime [ time ]
    fhir:ElementDefinition.minValueDecimal [ decimal ]
    fhir:ElementDefinition.minValueInteger [ integer ]
    fhir:ElementDefinition.minValuePositiveInt [ positiveInt ]
    fhir:ElementDefinition.minValueUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.minValueQuantity [ Quantity ]
  # ElementDefinition.maxValue[x] : 0..1 Maximum Allowed Value (for some types). One of these 9
    fhir:ElementDefinition.maxValueDate [ date ]
    fhir:ElementDefinition.maxValueDateTime [ dateTime ]
    fhir:ElementDefinition.maxValueInstant [ instant ]
    fhir:ElementDefinition.maxValueTime [ time ]
    fhir:ElementDefinition.maxValueDecimal [ decimal ]
    fhir:ElementDefinition.maxValueInteger [ integer ]
    fhir:ElementDefinition.maxValuePositiveInt [ positiveInt ]
    fhir:ElementDefinition.maxValueUnsignedInt [ unsignedInt ]
    fhir:ElementDefinition.maxValueQuantity [ Quantity ]
  fhir:ElementDefinition.maxLength [ integer ]; # 0..1 Max length for strings
  fhir:ElementDefinition.condition [ id ], ... ; # 0..* Reference to invariant about presence
  fhir:ElementDefinition.constraint [ # 0..* Condition that must evaluate to true
    fhir:ElementDefinition.constraint.key [ id ]; # 1..1 Target of 'condition' reference above
    fhir:ElementDefinition.constraint.requirements [ string ]; # 0..1 Why this constraint is necessary or appropriate
    fhir:ElementDefinition.constraint.severity [ code ]; # 1..1 error | warning
    fhir:ElementDefinition.constraint.human [ string ]; # 1..1 Human description of constraint
    fhir:ElementDefinition.constraint.expression [ string ]; # 1..1 FHIRPath expression of constraint
    fhir:ElementDefinition.constraint.xpath [ string ]; # 0..1 XPath expression of constraint
    fhir:ElementDefinition.constraint.source [ uri ]; # 0..1 Reference to original source of constraint
  ], ...;
  fhir:ElementDefinition.mustSupport [ boolean ]; # 0..1 If the element must supported
  fhir:ElementDefinition.isModifier [ boolean ]; # 0..1 If this modifies the meaning of other elements
  fhir:ElementDefinition.isSummary [ boolean ]; # 0..1 Include when _summary = true?
  fhir:ElementDefinition.binding [ # 0..1 ValueSet details if this is coded
    fhir:ElementDefinition.binding.strength [ code ]; # 1..1 required | extensible | preferred | example
    fhir:ElementDefinition.binding.description [ string ]; # 0..1 Human explanation of the value set
    # ElementDefinition.binding.valueSet[x] : 0..1 Source of value set. One of these 2
      fhir:ElementDefinition.binding.valueSetUri [ uri ]
      fhir:ElementDefinition.binding.valueSetReference [ Reference(ValueSet) ]
  ];
  fhir:ElementDefinition.mapping [ # 0..* Map element to another set of definitions
    fhir:ElementDefinition.mapping.identity [ id ]; # 1..1 Reference to mapping declaration
    fhir:ElementDefinition.mapping.language [ code ]; # 0..1 Computable language of mapping
    fhir:ElementDefinition.mapping.map [ string ]; # 1..1 Details of the mapping
    fhir:ElementDefinition.mapping.comment [ string ]; # 0..1 Comments about the mapping or its use
  ], ...;
]

Changes since DSTU2

ElementDefinition

ElementDefinition.representation

Add Codes xmlText, typeAttr, cdaText, xhtml

ElementDefinition.sliceName

Renamed from name to sliceName

ElementDefinition.slicing.discriminator

Type changed from string to Element

ElementDefinition.slicing.discriminator.type

Added Element

ElementDefinition.slicing.discriminator.path

Added Element

ElementDefinition.comment

Renamed from comments to comment

ElementDefinition.min

Type changed from integer to unsignedInt

ElementDefinition.base.min

Type changed from integer to unsignedInt

ElementDefinition.contentReference

Renamed from nameReference to contentReference
Type changed from string to uri

ElementDefinition.type.code

Type changed from code to uri
Change binding strength from required to extensible

ElementDefinition.type.profile

Max Cardinality changed from * to 1

ElementDefinition.type.targetProfile

Added Element

ElementDefinition.type.versioning

Added Element

ElementDefinition.defaultValue[x]

Add Age, Add Count, Add Distance, Add Duration, Add Money

ElementDefinition.orderMeaning

Added Element

ElementDefinition.fixed[x]

Add Age, Add Count, Add Distance, Add Duration, Add Money

ElementDefinition.pattern[x]

Add Age, Add Count, Add Distance, Add Duration, Add Money

ElementDefinition.example

Renamed from example[x] to example
Max Cardinality changed from 1 to *
Remove boolean, Remove integer, Remove decimal, Remove base64Binary, Remove instant, Remove string, Remove uri, Remove date, Remove dateTime, Remove time, Remove code, Remove oid, Remove id, Remove unsignedInt, Remove positiveInt, Remove markdown, Remove Annotation, Remove Attachment, Remove Identifier, Remove CodeableConcept, Remove Coding, Remove Quantity, Remove Range, Remove Period, Remove Ratio, Remove SampledData, Remove Signature, Remove HumanName, Remove Address, Remove ContactPoint, Remove Timing, Remove Reference, Remove Meta

ElementDefinition.example.label

Added Element

ElementDefinition.example.value[x]

Added Element

ElementDefinition.minValue[x]

Remove boolean, Remove base64Binary, Remove string, Remove uri, Remove code, Remove oid, Remove id, Remove markdown, Remove Annotation, Remove Attachment, Remove Identifier, Remove CodeableConcept, Remove Coding, Remove Range, Remove Period, Remove Ratio, Remove SampledData, Remove Signature, Remove HumanName, Remove Address, Remove ContactPoint, Remove Timing, Remove Reference, Remove Meta

ElementDefinition.maxValue[x]

Remove boolean, Remove base64Binary, Remove string, Remove uri, Remove code, Remove oid, Remove id, Remove markdown, Remove Annotation, Remove Attachment, Remove Identifier, Remove CodeableConcept, Remove Coding, Remove Range, Remove Period, Remove Ratio, Remove SampledData, Remove Signature, Remove HumanName, Remove Address, Remove ContactPoint, Remove Timing, Remove Reference, Remove Meta

ElementDefinition.constraint.expression

Added Element

ElementDefinition.constraint.xpath

Min Cardinality changed from 1 to 0

ElementDefinition.constraint.source

Added Element

ElementDefinition.mapping.comment

Added Element

See the Full Difference for further information

Constraints

eld-1: On ElementDefinition.slicing: If there are no discriminators, there must be a definition (expression on ElementDefinition.slicing: discriminator.exists() or description.exists())
eld-2: Min <= Max (expression : min.empty() or max.empty() or (max = '*') or (min <= max.toInteger()))
eld-3: On ElementDefinition.max: Max SHALL be a number or "*" (expression on ElementDefinition.max: empty() or ($this = '*') or (toInteger() >= 0))
eld-4: On ElementDefinition.type: Aggregation may only be specified if one of the allowed types for the element is a resource (expression on ElementDefinition.type: aggregation.empty() or (code = 'Reference'))
eld-5: if the element definition has a contentReference, it cannot have type, defaultValue, fixed, pattern, example, minValue, maxValue, maxLength, or binding (expression : contentReference.empty() or (type.empty() and defaultValue.empty() and fixed.empty() and pattern.empty() and example.empty() and minValue.empty() and maxValue.empty() and maxLength.empty() and binding.empty()))
eld-6: Fixed value may only be specified if there is one type (expression : fixed.empty() or (type.count() <= 1))
eld-7: Pattern may only be specified if there is one type (expression : pattern.empty() or (type.count() <= 1))
eld-8: Pattern and value are mutually exclusive (expression : pattern.empty() or fixed.empty())
eld-11: Binding can only be present for coded elements, string, and uri (expression : binding.empty() or type.code.empty() or type.select((code = 'code') or (code = 'Coding') or (code='CodeableConcept') or (code = 'Quantity') or (code = 'Extension') or (code = 'string') or (code = 'uri')).exists())
eld-12: On ElementDefinition.binding: ValueSet as a URI SHALL start with http:// or https:// or urn: (expression on ElementDefinition.binding: valueSet.is(uri).not() or valueSet.as(uri).startsWith('http:') or valueSet.as(uri).startsWith('https') or valueSet.as(uri).startsWith('urn:'))
eld-13: Types must be unique by the combination of code and profile (expression : type.select(code&profile&targetProfile).isDistinct())
eld-14: Constraints must be unique by key (expression : constraint.select(key).isDistinct())
eld-15: default value and meaningWhenMissing are mutually exclusive (expression : defaultValue.empty() or meaningWhenMissing.empty())
eld-16: sliceName must be composed of proper tokens separated by "/" (expression : sliceName.empty() or sliceName.matches('^[a-zA-Z0-9\\/\\-\\_]+$'))

2.32.0.2 Use of ElementDefinition.path

The path element is the most important property of the element definition. It both names the element, and locates the element within a hierarchy defined within a particular context. Within the FHIR specification, there is only one original definition for each path (that is, an element definition with no base element). This is the master definition to which all the other definitions with the same path must conform.

All elements defined within the FHIR specification itself are defined within a StructureDefinition that defines a resource, or a datatype. This defines the identity of the element and provides the context in which the meaning of the element is understood. When Elements are defined, the following rules apply:

Element names (the parts of a path delineated by the '.' character) SHALL not contain whitespace (i.e. Unicode characters marked as whitespace)
Element names SHALL not contain the characters ,:;'"/|?|!@#$%^&*()[]{}
Element names SHOULD not contain non-ASCII characters
Element paths SHALL not exceed 64 characters in length
Element paths cannot imply elements that are not explicitly defined i.e. a.b.c.d cannot be defined unless a.b.c is explicitly defined
By convention, each path start with an uppercase letter (type) but all the element names that follow this are lowercase (not type names). All resources and data types (except for Primitive data types) follow this convention, but logical models are not required to do so

Elements may be defined in:

StructureDefinitions of kind = resource, complex-type or primitive-type, where derivation = specialization. These are either Resources or Data types defined in the specification, or in custom resource definitions (see Custom Resource Policy )
StructureDefinitions of kind = logical
Data Elements

StructureDefinitions with derivation = constraint (i.e. Resource and Data Type profiles) are not allowed to define or include ElementDefinitions with a path not defined within the base resource definition from which they derive (e.g. in the FHIR specification).

2.32.0.3 ElementDefinition.id

In addition to the path, every ElementDefinition SHALL have a populated id, and the id SHALL have a unique value populated by following this algorithm:

The id will be constructed as a dot separated string, each part corresponding to a token in the path
For each token in the path, use the syntax pathpart:slicename/reslicename

Note that in a profile with no slices, this id will match the path exactly and entirely. id values constructed in this fashion are unique, and persistent, and may be used as the target of external references into the definition, where necessary.

2.32.0.4 Interpretation of ElementDefinition in different contexts

The data type ElementDefinition is used both in StructureDefinition and DataElement, and within those resources, the way its elements are to be used and interpreted depends on the context where ElementDefinition used:

ElementDefinition field

DataElement

Type definition, first element

Type definition, following elements

Constraint Definition, first element

Constraint Definition, following elements

sliceName

prohibited

required for slices, else prohibited

label

optional

recommended

code

optional

slicing

prohibited

optional

short/definition

optional

required

required^‡

requirements/
comments/alias

optional

prohibited

optional

prohibited^‡

optional^‡

base

prohibited

required

type

required

optional

nameReference

prohibited

optional

prohibited

optional

min/max

optional

optional (irrelevant)

required

optional

optional^†

defaultValue[x]

optional

prohibited

optional

prohibited

optional^†

meaningWhenMissing

optional

prohibited

optional

prohibited

optional^†

fixed[x]

prohibited

optional

pattern[x]

optional

prohibited

optional

example[x]

optional

prohibited

optional

prohibited

optional

minValue[x]

optional

prohibited

optional

maxValue[x]

optional

prohibited

optional

maxLength

optional

prohibited

optional

mustSupport

optional

prohibited

optional

isModifier

prohibited

optional

prohibited

optional^†

isSummary

prohibited

optional

prohibited

optional^†

binding

optional

prohibited

optional

prohibited

optional

constraint

optional

optional^∆

condition

optional

prohibited

optional

prohibited

optional^∆

mapping

optional

optional^∆

Notes:

Type definition: A StructureDefinition without a base element, or where the derivation type is 'specialization'
Constraint definition: A StructureDefinition with a base element and a derivation of 'constraint' - e.g. a definition of a structure that constrains another base structure, referring to the differential portion
^†: The element's presence, and value, must match the definition in the base structure
^‡: The element content must be consistent with that matching element in the base structure
^∆: Additional constraints and mappings can be defined, but they do not replace the ones in the base structure

The use of Path and type depends more deeply on the context where the ElementDefinition is used:

Context path (1st element) path (following elements) type (1st element)

Data Element Any token Any token (distinct in the DataElement) Any type

Base definition of a data type
(example: Quantity - XML, JSON) Name of the type Path inside the datatype Element

A constrained data type
(example: Money - XML, JSON) Name of the base type Path inside the datatype Name of the base type

Base definition of a resource
(example: Patient - XML, JSON) The name of the resource Path inside the resource DomainResource or sometimes Resource

Constraint on a resource
(example: DAF Patient - XML, JSON) The name of the resource Path inside the resource
(including into the data types) The name of the resource

Base Extension (a standard data type)
(example: Extension - XML, JSON) Extension Extension.value[x] or Extension.extension Extension

A defined Extension
(example: Extension - XML, JSON) Extension Extension.value[x] or Extension.extension (for complex extensions) Extension

There are additional notes about the use of ElementDefinition when defining Extensions on the Defining Extensions page.

2.32.0.4.1 Rules about Slicing

For a description of slicing, see Slicing

Slicing is only allowed when constraining an existing structure
slicing can only be used on the first repeat of an element, this element is considered to be the slicing entry
All elements following the first repeat that containing a slicing SHALL have a sliceName
The first entry (the one having the slicing information) is understood to be the set of constraints to be used for the "open" slice, i.e., when the slice is open, this definition is used as a constraint on elements in the instance that are not part of a slice and belong to the open portion of the slice. Its use follows the "normal case", except:
- slicing must be present
- min and max govern the number of total occurrences of the sliced element including the number of occurrences in the open portion of the slice.
An element with a cardinality of 0..1 and a choice of multiple types can be sliced by type. This is to specify different constraints for different types. In this case, the discriminator SHALL be "@type"

2.32.0.4.2 Rules about min and max

In a DataElement, min and max are always required.

In a StructureDefinition:

If there is no StructureDefinition.base: min and max are always required
Otherwise, in StructureDefinition.differential: min and max are always optional; if they are not present, they default to the base min and max
In StructureDefinition.snapshot: min and max are always required

2.32.0.4.3 Missing Elements

Most elements have a minimum cardinality of 0, which means that they may be missing from a resource when it is exchanged between systems. Generally, when an element is missing, all that an application processing the resource can say about the element is that the value is unknown - it may have a correct value, but it has not been provided for security or workflow reasons. On the other hand, it may not have a value at all. All the application can say is that the value is unknown.

However, for some elements, this specification makes specific rules about what it means if the element is missing. For some elements, this takes the form of a default value, a value that should be assumed if an element is present. For example, here are some default values:

Element

Default Value

ElementDefinition.mustSupport

false

SampledData.factor

ValueSet.codeSystem.concept.abstract

false

List.entry.deleted

false

Most default values are mathematical / numerical non-operations e.g. false, 0 for addition or 1 for multiplication. Default values are rarely used because:

The value must be known by all implementations
When an element has a default value, it can never be unknown - e.g. it is implicitly mandatory
The default value can never be changed.

For other elements, the resource explicitly documents the meaning of a missing element, and that meaning is not represented by a default value. Some examples:

Element

Meaning when missing

Period.end

If the end of the period is missing, it means that the period is ongoing

Quantity.comparator

If there is no comparator, then there is no modification of the value

MedicationAdministration.wasNotGiven

If this is missing, then the medication was administered

Substance.instance

If this element is not present, then the substance resource describes a kind of substance

Like default values, and for the same reasons, assigning a meaning when an element is missing is something that is not done very often. Note that Profiles cannot change the default value or missing meaning of an element, since this cannot be done in the base specification either.

Here is a list of all elements with a default value or a missing meaning:

Period.end: If the end of the period is missing, it means that the period is ongoing
Quantity.comparator: If there is no comparator, then there is no modification of the value
SampledData.factor: 1
ElementDefinition.slicing.ordered: false
ElementDefinition.type.versioning: either
ElementDefinition.mustSupport: false
ElementDefinition.isModifier: false
ElementDefinition.isSummary: false
Timing.repeat.frequency: 1
BodySite.active: true
CarePlan.activity.detail.prohibited: false
CommunicationRequest.priority: If missing, this task should be performed with normal priority
ConceptMap.group.element.target.equivalence: equivalent
ConceptMap.group.element.target.dependsOn.system: The code is in the source (dependsOn) or target (product) system
Condition.verificationStatus: unknown
Consent.period: all date ranges included
Consent.actor: There is no specific actor associated with the consent
Consent.action: all actions
Consent.data: all data
Consent.except.actor: There is no specific actor associated with the exception
Consent.except.action: all actions
Consent.except.data: all data
DeviceRequest.priority: If missing, normal priority
ExpansionProfile.excludedSystem.version: Exclusion is not version specific
ExpansionProfile.includeDefinition: false
ExpansionProfile.activeOnly: false
FamilyMemberHistory.notDone: false
FamilyMemberHistory.estimatedAge: It is unknown whether the age is an estimate or not
Group.active: true
Group.member.period: The member is in the group at this time
Group.member.inactive: false
HealthcareService.active: true
Linkage.active: true
List.entry.deleted: false
Media.frames: 1
MedicationAdministration.notGiven: If this is missing, then the medication was administered
MessageDefinition.focus.min: 0
MessageDefinition.responseRequired: false
NamingSystem.uniqueId.preferred: If there are multiple ids, and one is labeled "preferred", then the assumption is that the others are not preferred. In the absence of any id marked as preferred, no inference can be drawn
Organization.active: true
Patient.active: true
Practitioner.active: true
PractitionerRole.active: true
Procedure.notDone: false
ProcedureRequest.priority: If missing, this task should be performed with normal priority
ProcedureRequest.doNotPerform: false
Questionnaire.item.required: false
Questionnaire.item.repeats: false
RelatedPerson.active: true
RequestGroup.priority: If missing, this request should be performed with normal priority
Schedule.active: true
Slot.overbooked: If overbooked is missing, systems may assume that there are still appointments available
Substance.instance: If this element is not present, then the substance resource describes a kind of substance
SupplyRequest.priority: If missing, this task should be performed with normal priority
Task.priority: If missing, this task should be performed with normal priority
TestScript.origin.profile: FHIR-Client
TestScript.destination.profile: FHIR-Server
TestScript.metadata.capability.required: false
TestScript.metadata.capability.validated: false
TestScript.fixture.autocreate: false
TestScript.fixture.autodelete: false
TestScript.setup.action.operation.accept: xml
TestScript.setup.action.operation.contentType: xml
TestScript.setup.action.operation.encodeRequestUrl: true
TestScript.setup.action.assert.contentType: xml
TestScript.setup.action.assert.warningOnly: false
ValueSet.expansion.offset: Paging is not being used
ValueSet.expansion.contains.abstract: false
ValueSet.expansion.contains.inactive: false