FHIR Extensions Pack
5.3.0 - May 2026 International flag

FHIR Extensions Pack, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 5.3.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-extensions/ and changes regularly. See the Directory of published versions

Extension: ValueSet Expand Group

Official URL: http://hl7.org/fhir/StructureDefinition/valueset-expand-group Version: 5.3.0
Standards status: Deprecated Maturity Level: 1 Responsible: HL7 International / Terminology Infrastructure Computable Name: ValueSetExpandGroup
Other Identifiers: OID:2.16.840.1.113883.4.642.40.97.42.92

This extension declares a group of concepts that is generated into the ValueSet.expansion.contains hierarchy when the expansion is generated for a UI. THere is no inherent assigned meaning to the hierarchy; it is used to help the user navigate the concepts. Each group has a display and/or a code, and a list of members, which are either concepts in the value set, or other groups (by code).

Context of Use

This extension is deprecated and should no longer be used

This extension is deprecated because it was underspecified and experience showed it was not usable. No replacement is planned

This extension may be used on the following element(s)

Usage info

Usages:

  • This Extension is not used by any profiles in this Specification

You can also check for usages in the FHIR IG Statistics

Changes since version 5.3.0:

  • No changes

    • Formal Views of Extension Content

    Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

    This structure is derived from Extension

    Summary

    Complex Extension: This extension declares a group of concepts that is generated into the ValueSet.expansion.contains hierarchy when the expansion is generated for a UI. THere is no inherent assigned meaning to the hierarchy; it is used to help the user navigate the concepts. Each group has a display and/or a code, and a list of members, which are either concepts in the value set, or other groups (by code).

    • code: code: A reference to a code from the include.system that defines the meaning associated with the group. Note that including the code in this extension does not include the code in the value set; if the code is intended to be in the value set, it must be listed directly as well.
    • display: string: The description for the group (goes in ValueSet.expansion.contains.dispaly). All groups need a display; this can only be omitted if there is a code that can be used to determine the display.
    • member: code: One of more codes that identify codes in the expansion or other groups.

    Maturity: 1

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Defines a hierarchy structure (when in UI mode)
    Extension.Slices for extension Content/Rules for all slices
    Extension.Slices for extension.extension:code 0..1 Extension Underlying code from the system
    Extension.Slices for extension.extension:code.extension 0..0 Extension
    Extension.Slices for extension.extension:code.url 1..1 uri "code"
    Extension.Slices for extension.extension:code.value[x] 1..1 code Value of extension
    Extension.Slices for extension.extension:display 0..1 Extension Display for the group
    Extension.Slices for extension.extension:display.extension 0..0 Extension
    Extension.Slices for extension.extension:display.url 1..1 uri "display"
    Extension.Slices for extension.extension:display.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:member 1..* Extension Codes or other groups in this group
    Extension.Slices for extension.extension:member.extension 0..0 Extension
    Extension.Slices for extension.extension:member.url 1..1 uri "member"
    Extension.Slices for extension.extension:member.value[x] 1..1 code Value of extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-expand-group"
    Extension.value[x] 0..0 Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Defines a hierarchy structure (when in UI mode)
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension 1..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:code 0..1 Extension Underlying code from the system
    Extension.Slices for extension.extension:code.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:code.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:code.url 1..1 uri "code"
    Extension.Slices for extension.extension:code.value[x] 1..1 code Value of extension
    Extension.Slices for extension.extension:display 0..1 Extension Display for the group
    Extension.Slices for extension.extension:display.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:display.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:display.url 1..1 uri "display"
    Extension.Slices for extension.extension:display.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:member 1..* Extension Codes or other groups in this group
    Extension.Slices for extension.extension:member.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:member.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:member.url 1..1 uri "member"
    Extension.Slices for extension.extension:member.value[x] 1..1 code Value of extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-expand-group"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Complex Extension: This extension declares a group of concepts that is generated into the ValueSet.expansion.contains hierarchy when the expansion is generated for a UI. THere is no inherent assigned meaning to the hierarchy; it is used to help the user navigate the concepts. Each group has a display and/or a code, and a list of members, which are either concepts in the value set, or other groups (by code).

    • code: code: A reference to a code from the include.system that defines the meaning associated with the group. Note that including the code in this extension does not include the code in the value set; if the code is intended to be in the value set, it must be listed directly as well.
    • display: string: The description for the group (goes in ValueSet.expansion.contains.dispaly). All groups need a display; this can only be omitted if there is a code that can be used to determine the display.
    • member: code: One of more codes that identify codes in the expansion or other groups.

    Maturity: 1

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Defines a hierarchy structure (when in UI mode)
    Extension.Slices for extension Content/Rules for all slices
    Extension.Slices for extension.extension:code 0..1 Extension Underlying code from the system
    Extension.Slices for extension.extension:code.extension 0..0 Extension
    Extension.Slices for extension.extension:code.url 1..1 uri "code"
    Extension.Slices for extension.extension:code.value[x] 1..1 code Value of extension
    Extension.Slices for extension.extension:display 0..1 Extension Display for the group
    Extension.Slices for extension.extension:display.extension 0..0 Extension
    Extension.Slices for extension.extension:display.url 1..1 uri "display"
    Extension.Slices for extension.extension:display.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:member 1..* Extension Codes or other groups in this group
    Extension.Slices for extension.extension:member.extension 0..0 Extension
    Extension.Slices for extension.extension:member.url 1..1 uri "member"
    Extension.Slices for extension.extension:member.value[x] 1..1 code Value of extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-expand-group"
    Extension.value[x] 0..0 Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Defines a hierarchy structure (when in UI mode)
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension 1..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.Slices for extension.extension:code 0..1 Extension Underlying code from the system
    Extension.Slices for extension.extension:code.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:code.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:code.url 1..1 uri "code"
    Extension.Slices for extension.extension:code.value[x] 1..1 code Value of extension
    Extension.Slices for extension.extension:display 0..1 Extension Display for the group
    Extension.Slices for extension.extension:display.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:display.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:display.url 1..1 uri "display"
    Extension.Slices for extension.extension:display.value[x] 1..1 string Value of extension
    Extension.Slices for extension.extension:member 1..* Extension Codes or other groups in this group
    Extension.Slices for extension.extension:member.id 0..1 id Unique id for inter-element referencing
    Extension.Slices for extension.extension:member.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.Slices for extension.extension:member.url 1..1 uri "member"
    Extension.Slices for extension.extension:member.value[x] 1..1 code Value of extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-expand-group"

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Constraints

    Id Grade Path(s) Description Expression
    ele-1 error **ALL** elements All FHIR elements must have a @value or children hasValue() or (children().count() > id.count())
    ext-1 error **ALL** extensions Must have either extensions or value[x], not both extension.exists() != value.exists()

    R4B

    The extension is unchanged in R4B

    R4

    The extension is unchanged in R4

    R3

    The extension is unchanged in R3

    Search Parameters for this Extension

    (none found)