FHIR Extensions Pack
5.3.0-ballot-tc1 - (September 2025 Ballot) 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-ballot-tc1 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: Identifier

Official URL: http://hl7.org/fhir/StructureDefinition/elementdefinition-identifier Version: 5.3.0-ballot-tc1
Standards status: Deprecated Maturity Level: 3 Computable Name: Identifier
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1602

External Identifiers associated with this element - these are identifiers that are associated with the concept this element represents. DEPRECATED: Use either ElementDefinition.code or ElementDefinition.mapping to provide the mapping instead

Context of Use

This extension is deprecated and should no longer be used

Use either ElementDefinition.code or ElementDefinition.mapping to provide the mapping instead

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

Usage info

Usages:

  • This Extension is not used by any profiles in this Implementation Guide

You can also check for usages in the FHIR IG Statistics

Changes since version 5.2.0:

  • 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

    Simple Extension with the type Identifier: External Identifiers associated with this element - these are identifiers that are associated with the concept this element represents. DEPRECATED: Use either ElementDefinition.code or ElementDefinition.mapping to provide the mapping instead

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension External Identifier associated with this element
    ... extension 0..0 Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/elementdefinition-identifier"
    ... value[x] 1..1 Identifier Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension External Identifier associated with this element
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0 Extension
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/elementdefinition-identifier"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type Identifier: External Identifiers associated with this element - these are identifiers that are associated with the concept this element represents. DEPRECATED: Use either ElementDefinition.code or ElementDefinition.mapping to provide the mapping instead

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension External Identifier associated with this element
    ... extension 0..0 Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/elementdefinition-identifier"
    ... value[x] 1..1 Identifier Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension External Identifier associated with this element
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0 Extension
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/elementdefinition-identifier"

    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)