minimal Common Oncology Data Elements (mCODE) Implementation Guide
3.0.0 - STU3 Release United States of America flag

This page is part of the HL7 FHIR Implementation Guide: minimal Common Oncology Data Elements (mCODE) Release 1 - US Realm | STU1 (v3.0.0: STU 3) based on FHIR R4. This is the current published version. For a full list of available versions, see the Directory of published versions

Extension: RadiotherapyDoseDeliveredToVolume - Detailed Descriptions

Draft as of 2023-10-26 Maturity Level: 3

Definitions for the mcode-radiotherapy-dose-delivered-to-volume extension.

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

0. Extension
Definition

Dose delivered to a given radiotherapy volume.

ShortRadiotherapy Dose Delivered To Volume Extension
2. Extension.extension
Control1..?
4. Extension.extension:volume
Slice Namevolume
Definition

A BodyStructure resource representing volume in the body where radiation was delivered, for example, Chest Wall Lymph Nodes.

ShortVolume in the body where radiation was delivered
Control1..1
Must Supporttrue
6. Extension.extension:volume.extension
Control0..0
8. Extension.extension:volume.url
Fixed Valuevolume
10. Extension.extension:volume.value[x]
TypeReference(Radiotherapy Volume Profile)
[x] NoteSee Choice of Data Types for further information about how to use [x]
12. Extension.extension:totalDoseDelivered
Slice NametotalDoseDelivered
Definition

The total amount of physical radiation delivered to this volume within the scope of this dose delivery, i.e., dose delivered from the Procedure in which this extension is used.

ShortTotal Physical Radiation Dose Delivered
Control0..1
Must Supporttrue
14. Extension.extension:totalDoseDelivered.extension
Control0..0
16. Extension.extension:totalDoseDelivered.url
Fixed ValuetotalDoseDelivered
18. Extension.extension:totalDoseDelivered.value[x]
TypeQuantity
[x] NoteSee Choice of Data Types for further information about how to use [x]
Pattern Value&lt;valueQuantity&nbsp;xmlns=&quot;http://hl7.org/fhir&quot;&gt;<br/>&nbsp;&nbsp;&lt;system&nbsp;value=&quot;http://unitsofmeasure.org&quot;/&gt;<br/>&nbsp;&nbsp;&lt;code&nbsp;value=&quot;cGy&quot;/&gt;<br/>&lt;/valueQuantity&gt;<br/>
20. Extension.extension:fractionsDelivered
Slice NamefractionsDelivered
Definition

The number of fractions delivered to this volume.

ShortNumber of Fractions Delivered
Control0..1
Must Supporttrue
22. Extension.extension:fractionsDelivered.extension
Control0..0
24. Extension.extension:fractionsDelivered.url
Fixed ValuefractionsDelivered
26. Extension.extension:fractionsDelivered.value[x]
TypeunsignedInt
[x] NoteSee Choice of Data Types for further information about how to use [x]
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
28. Extension.url
Fixed Valuehttp://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-dose-delivered-to-volume
30. Extension.value[x]
Control0..0

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

0. Extension
Definition

Dose delivered to a given radiotherapy volume.


Optional Extension Element - found in all resources.

ShortRadiotherapy Dose Delivered To Volume ExtensionOptional Extensions Element
Control0..*
This element is affected by the following invariants: ele-1
Is Modifierfalse
Invariantsele-1: All FHIR elements must have a @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.

ShortExtensionAdditional 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.

Control10..*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
4. Extension.extension:volume
Slice Namevolume
Definition

A BodyStructure resource representing volume in the body where radiation was delivered, for example, Chest Wall Lymph Nodes.

ShortVolume in the body where radiation was deliveredAdditional content defined by implementations
Control10..1*
TypeExtension
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @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:volume.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.

ShortExtensionAdditional 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.

Control0..0*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
8. Extension.extension:volume.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed Valuevolume
10. Extension.extension:volume.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..1
TypeReference(Radiotherapy Volume Profile), 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, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] NoteSee Choice of Data Types for further information about how to use [x]
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
12. Extension.extension:totalDoseDelivered
Slice NametotalDoseDelivered
Definition

The total amount of physical radiation delivered to this volume within the scope of this dose delivery, i.e., dose delivered from the Procedure in which this extension is used.

ShortTotal Physical Radiation Dose DeliveredAdditional content defined by implementations
Control0..1*
TypeExtension
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
14. Extension.extension:totalDoseDelivered.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.

ShortExtensionAdditional 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.

Control0..0*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
16. Extension.extension:totalDoseDelivered.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed ValuetotalDoseDelivered
18. Extension.extension:totalDoseDelivered.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..1
TypeQuantity, 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, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, unsignedInt, time
[x] NoteSee Choice of Data Types for further information about how to use [x]
Is Modifierfalse
Summaryfalse
Pattern Value&lt;valueQuantity&nbsp;xmlns=&quot;http://hl7.org/fhir&quot;&gt;<br/>&nbsp;&nbsp;&lt;system&nbsp;value=&quot;http://unitsofmeasure.org&quot;/&gt;<br/>&nbsp;&nbsp;&lt;code&nbsp;value=&quot;cGy&quot;/&gt;<br/>&lt;/valueQuantity&gt;<br/>
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
20. Extension.extension:fractionsDelivered
Slice NamefractionsDelivered
Definition

The number of fractions delivered to this volume.

ShortNumber of Fractions DeliveredAdditional content defined by implementations
Control0..1*
TypeExtension
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
22. Extension.extension:fractionsDelivered.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.

ShortExtensionAdditional 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.

Control0..0*
TypeExtension
Is Modifierfalse
Summaryfalse
Alternate Namesextensions, user content
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
24. Extension.extension:fractionsDelivered.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed ValuefractionsDelivered
26. Extension.extension:fractionsDelivered.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..1
TypeunsignedInt, 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, string, Contributor, oid, instant, ContactPoint, HumanName, Money, markdown, Ratio, Age, Reference, TriggerDefinition, Quantity, uri, url, Annotation, ContactDetail, boolean, Expression, Signature, time
[x] NoteSee Choice of Data Types for further information about how to use [x]
Is Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
28. Extension.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed Valuehttp://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-dose-delivered-to-volume
30. Extension.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..01
TypeChoice 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 Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
Invariantsele-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 found here

0. Extension
Definition

Dose delivered to a given radiotherapy volume.

ShortRadiotherapy Dose Delivered To Volume Extension
Control0..*
This element is affected by the following invariants: ele-1
Is Modifierfalse
Invariantsele-1: All FHIR elements must have a @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.

ShortUnique id for inter-element referencing
Control0..1
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
4. Extension.extension
Definition

An Extension

ShortExtension
Control1..*
TypeExtension
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
6. Extension.extension:volume
Slice Namevolume
Definition

A BodyStructure resource representing volume in the body where radiation was delivered, for example, Chest Wall Lymph Nodes.

ShortVolume in the body where radiation was delivered
Control1..1
TypeExtension
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @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:volume.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

ShortUnique id for inter-element referencing
Control0..1
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
10. Extension.extension:volume.extension
Definition

An Extension

ShortExtension
Control0..0
TypeExtension
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
12. Extension.extension:volume.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed Valuevolume
14. Extension.extension:volume.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..1
TypeReference(Radiotherapy Volume Profile)
[x] NoteSee Choice of Data Types for further information about how to use [x]
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
16. Extension.extension:totalDoseDelivered
Slice NametotalDoseDelivered
Definition

The total amount of physical radiation delivered to this volume within the scope of this dose delivery, i.e., dose delivered from the Procedure in which this extension is used.

ShortTotal Physical Radiation Dose Delivered
Control0..1
TypeExtension
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @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:totalDoseDelivered.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

ShortUnique id for inter-element referencing
Control0..1
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
20. Extension.extension:totalDoseDelivered.extension
Definition

An Extension

ShortExtension
Control0..0
TypeExtension
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
22. Extension.extension:totalDoseDelivered.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed ValuetotalDoseDelivered
24. Extension.extension:totalDoseDelivered.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..1
TypeQuantity
[x] NoteSee Choice of Data Types for further information about how to use [x]
Is Modifierfalse
Summaryfalse
Pattern Value&lt;valueQuantity&nbsp;xmlns=&quot;http://hl7.org/fhir&quot;&gt;<br/>&nbsp;&nbsp;&lt;system&nbsp;value=&quot;http://unitsofmeasure.org&quot;/&gt;<br/>&nbsp;&nbsp;&lt;code&nbsp;value=&quot;cGy&quot;/&gt;<br/>&lt;/valueQuantity&gt;<br/>
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
26. Extension.extension:fractionsDelivered
Slice NamefractionsDelivered
Definition

The number of fractions delivered to this volume.

ShortNumber of Fractions Delivered
Control0..1
TypeExtension
Is Modifierfalse
Must Supporttrue
Summaryfalse
Invariantsele-1: All FHIR elements must have a @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:fractionsDelivered.id
Definition

Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.

ShortUnique id for inter-element referencing
Control0..1
Typestring
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
30. Extension.extension:fractionsDelivered.extension
Definition

An Extension

ShortExtension
Control0..0
TypeExtension
Is Modifierfalse
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))
ext-1: Must have either extensions or value[x], not both (extension.exists() != value.exists())
SlicingThis element introduces a set of slices on Extension.extension.extension. The slices are unordered and Open, and can be differentiated using the following discriminators: , and can be differentiated using the following discriminators:
  • value @ url
32. Extension.extension:fractionsDelivered.url
Definition

Source of the definition for the extension code - a logical name or a URL.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed ValuefractionsDelivered
34. Extension.extension:fractionsDelivered.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..1
TypeunsignedInt
[x] NoteSee Choice of Data Types for further information about how to use [x]
Is Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
Invariantsele-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.

Shortidentifies 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.

Control1..1
Typeuri
Is Modifierfalse
XML FormatIn the XML format, this property is represented as an attribute.
Summaryfalse
Fixed Valuehttp://hl7.org/fhir/us/mcode/StructureDefinition/mcode-radiotherapy-dose-delivered-to-volume
38. Extension.value[x]
Definition

Value of extension - must be one of a constrained set of the data types (see Extensibility for a list).

ShortValue of extension
Control0..0
TypeChoice 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 Modifierfalse
Primitive ValueThis primitive element may be present, or absent, or replaced by an extension
Summaryfalse
Invariantsele-1: All FHIR elements must have a @value or children (hasValue() or (children().count() > id.count()))