US Core Implementation Guide
8.0.1 - STU 8 US

US Core Implementation Guide, published by HL7 International / Cross-Group Projects. This guide is not an authorized publication; it is the continuous build for version 8.0.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/US-Core/ and changes regularly. See the Directory of published versions

## Extension: USCoreEthnicityExtension - Detailed Descriptions

Page standards status: Trial-use | Maturity Level: 3

Definitions for the us-core-ethnicity extension.

- Key Elements Table
- Differential Elements Table
- Snapshot Elements Table

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

0. Extension
Definition | Concepts classifying the person into a named category of humans sharing common history, traits, geographical origin or nationality. The ethnicity codes used to represent these concepts are based upon the Race & Ethnicity - CDC (CDCREC) which includes over 900 concepts for representing race and ethnicity of which 43 reference ethnicity. The ethnicity concepts are grouped by and pre-mapped to the 2 OMB ethnicity categories: Hispanic or Latino Not Hispanic or Latino. Optional Extension Element - found in all resources.
Short | US Core ethnicity ExtensionOptional Extensions Element
Control | 0..1* This element is affected by the following invariants: ele-1
Is Modifier | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
2. Extension.extension
Definition | An Extension May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | ExtensionAdditional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 10..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
Slicing | This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:ombCategory
Slice Name | ombCategory
Definition | The 2 ethnicity category codes according to the OMB Standards for Maintaining, Collecting, and Presenting Federal Data on Race and Ethnicity, Statistical Policy Directive No. 15, as revised, October 30, 1997.
Short | Hispanic or Latino|Not Hispanic or LatinoAdditional content defined by implementations
Control | 0..1*
Type | Extension
Is Modifier | false
Must Support | true
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
6. Extension.extension:ombCategory.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `ombCategory`
8. Extension.extension:ombCategory.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 10..1
Binding | The codes SHALL be taken from For codes, see Ethnicity Categories (required to `http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.4.642.40.2.48.3` )
Type | Coding, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
10. Extension.extension:detailed
Slice Name | detailed
Definition | The 41 CDC ethnicity codes that are grouped under one of the 2 OMB ethnicity category codes.
Short | Extended ethnicity codesAdditional content defined by implementations
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
12. Extension.extension:detailed.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `detailed`
14. Extension.extension:detailed.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 10..1
Binding | The codes SHALL be taken from For codes, see Detailed Ethnicity Including Absence Reasons (required to `http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.4.642.40.2.48.1` )
Type | Coding, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. Extension.extension:text
Slice Name | text
Definition | Plain text representation of the ethnicity concept(s).
Short | ethnicity TextAdditional content defined by implementations
Control | 10..1*
Type | Extension
Is Modifier | false
Must Support | true
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count())) ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
18. Extension.extension:text.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `text`
20. Extension.extension:text.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 10..1
Type | string, date, Meta, Address, Attachment, integer, Count, DataRequirement, Dosage, uuid, Identifier, Coding, SampledData, id, positiveInt, Distance, Period, Duration, canonical, Range, RelatedArtifact, base64Binary, UsageContext, Timing, decimal, CodeableConcept, ParameterDefinition, dateTime, code, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
22. Extension.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `http://hl7.org/fhir/us/core/StructureDefinition/us-core-ethnicity`
24. Extension.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 0..01
Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))

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

0. Extension
Definition | Changed: Concepts classifying the person into a named category of humans sharing common history, traits, geographical origin or nationality. The ethnicity codes used to represent these concepts are based upon the Race & Ethnicity - CDC (CDCREC) which includes over 900 concepts for representing race and ethnicity of which 43 reference ethnicity. The ethnicity concepts are grouped by and pre-mapped to the 2 OMB ethnicity categories: Hispanic or Latino Not Hispanic or Latino.
Short | US Core ethnicity Extension
Control | 0..1
2. Extension.extension
Control | 1..?
Slicing | This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
4. Extension.extension:ombCategory
Slice Name | ombCategory
Definition | The 2 ethnicity category codes according to the OMB Standards for Maintaining, Collecting, and Presenting Federal Data on Race and Ethnicity, Statistical Policy Directive No. 15, as revised, October 30, 1997.
Short | Hispanic or Latino|Not Hispanic or Latino
Control | 0..1
Type | Extension
Must Support | true
6. Extension.extension:ombCategory.url
Control | 1..1
Type | uri
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Fixed Value | `ombCategory`
8. Extension.extension:ombCategory.value[x]
Control | 1..1
Binding | The codes SHALL be taken from Changed:Ethnicity Categories (required to `http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.4.642.40.2.48.3` )
Type | Coding
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
10. Extension.extension:detailed
Slice Name | detailed
Definition | The 41 CDC ethnicity codes that are grouped under one of the 2 OMB ethnicity category codes.
Short | Extended ethnicity codes
Control | 0..*
Type | Extension
12. Extension.extension:detailed.url
Control | 1..1
Type | uri
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Fixed Value | `detailed`
14. Extension.extension:detailed.value[x]
Control | 1..1
Binding | The codes SHALL be taken from Changed:Detailed Ethnicity Including Absence Reasons (required to `http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.4.642.40.2.48.1` )
Type | Coding
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
16. Extension.extension:text
Slice Name | text
Definition | Plain text representation of the ethnicity concept(s).
Short | ethnicity Text
Control | 1..1
Type | Extension
Must Support | true
18. Extension.extension:text.url
Control | 1..1
Type | uri
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Fixed Value | `text`
20. Extension.extension:text.value[x]
Control | 1..1
Type | string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
22. Extension.url
Control | 1..1
Fixed Value | `http://hl7.org/fhir/us/core/StructureDefinition/us-core-ethnicity`
24. Extension.value[x]
Control | 0..0

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

0. Extension
Definition | Changed: Concepts classifying the person into a named category of humans sharing common history, traits, geographical origin or nationality. The ethnicity codes used to represent these concepts are based upon the Race & Ethnicity - CDC (CDCREC) which includes over 900 concepts for representing race and ethnicity of which 43 reference ethnicity. The ethnicity concepts are grouped by and pre-mapped to the 2 OMB ethnicity categories: Hispanic or Latino Not Hispanic or Latino.
Short | US Core ethnicity Extension
Control | 0..1 This element is affected by the following invariants: ele-1
Is Modifier | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
2. Extension.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
4. Extension.extension
Definition | An Extension
Short | Extension
Control | 1..*
Type | Extension
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing | This element introduces a set of slices on `Extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
6. Extension.extension:ombCategory
Slice Name | ombCategory
Definition | The 2 ethnicity category codes according to the OMB Standards for Maintaining, Collecting, and Presenting Federal Data on Race and Ethnicity, Statistical Policy Directive No. 15, as revised, October 30, 1997.
Short | Hispanic or Latino|Not Hispanic or Latino
Control | 0..1
Type | Extension
Is Modifier | false
Must Support | true
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
8. Extension.extension:ombCategory.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
10. Extension.extension:ombCategory.extension
Definition | May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | Additional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
12. Extension.extension:ombCategory.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `ombCategory`
14. Extension.extension:ombCategory.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 1..1
Binding | The codes SHALL be taken from Ethnicity Categories (required to `http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.4.642.40.2.48.3` )
Type | Coding
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
16. Extension.extension:detailed
Slice Name | detailed
Definition | The 41 CDC ethnicity codes that are grouped under one of the 2 OMB ethnicity category codes.
Short | Extended ethnicity codes
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
18. Extension.extension:detailed.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
20. Extension.extension:detailed.extension
Definition | May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | Additional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
22. Extension.extension:detailed.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `detailed`
24. Extension.extension:detailed.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 1..1
Binding | The codes SHALL be taken from Detailed Ethnicity Including Absence Reasons (required to `http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113883.4.642.40.2.48.1` )
Type | Coding
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
26. Extension.extension:text
Slice Name | text
Definition | Plain text representation of the ethnicity concept(s).
Short | ethnicity Text
Control | 1..1
Type | Extension
Is Modifier | false
Must Support | true
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
28. Extension.extension:text.id
Definition | Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.
Short | Unique id for inter-element referencing
Control | 0..1
Type | string
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
30. Extension.extension:text.extension
Definition | May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.
Short | Additional content defined by implementations
Comments | There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.
Control | 0..*
Type | Extension
Is Modifier | false
Summary | false
Alternate Names | extensions, user content
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`) ext-1: Must have either extensions or value[x], not both (`extension.exists() != value.exists()`)
Slicing | This element introduces a set of slices on `Extension.extension.extension`. The slices areUnordered and Open, and can be differentiated using the following discriminators: value @ url
32. Extension.extension:text.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `text`
34. Extension.extension:text.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 1..1
Type | string
[x] Note | SeeChoice of Data Typesfor further information about how to use [x]
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)
36. Extension.url
Definition | Source of the definition for the extension code - a logical name or a URL.
Short | identifies the meaning of the extension
Comments | The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.
Control | 1..1
Type | uri
Is Modifier | false
XML Format | In the XML format, this property is represented as an attribute.
Summary | false
Fixed Value | `http://hl7.org/fhir/us/core/StructureDefinition/us-core-ethnicity`
38. Extension.value[x]
Definition | Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).
Short | Value of extension
Control | 0..0
Type | Choice of: base64Binary, boolean, canonical, code, date, dateTime, decimal, id, instant, integer, markdown, oid, positiveInt, string, time, unsignedInt, uri, url, uuid, Address, Age, Annotation, Attachment, CodeableConcept, Coding, ContactPoint, Count, Distance, Duration, HumanName, Identifier, Money, Period, Quantity, Range, Ratio, Reference, SampledData, Signature, Timing, ContactDetail, Contributor, DataRequirement, Expression, ParameterDefinition, RelatedArtifact, TriggerDefinition, UsageContext, Dosage, Meta
Is Modifier | false
Primitive Value | This primitive element may be present, or absent, or replaced by an extension
Summary | false
Invariants | ele-1: All FHIR elements must have a @value or children (`hasValue() or (children().count() > id.count())`)