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: References Contained

Official URL: http://hl7.org/fhir/StructureDefinition/referencesContained Version: 5.3.0-ballot-tc1
Standards status: Trial-use Maturity Level: 2 Computable Name: ReferencesContained
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1559

This indicates that the element containing this extension has an expression, xhtml, or some other content that makes reference to the specified contained resource in a way that is not detectable by the dom-3 constraint. This extension is included to make the reference 'visible' to the dom-3 constraint.

Context of Use

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:

  • The resource metadata has changed (status, description)
  • The data elements list has changed
  • One or more text definitions, invariants or bindings have changed

    • 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 Reference: This indicates that the element containing this extension has an expression, xhtml, or some other content that makes reference to the specified contained resource in a way that is not detectable by the dom-3 constraint. This extension is included to make the reference 'visible' to the dom-3 constraint.

    Maturity: 2

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Contained resource referenced by expression
    ... extension 0..0 Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/referencesContained"
    ... value[x] 1..1 Reference() Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Contained resource referenced by expression
    ... 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/referencesContained"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type Reference: This indicates that the element containing this extension has an expression, xhtml, or some other content that makes reference to the specified contained resource in a way that is not detectable by the dom-3 constraint. This extension is included to make the reference 'visible' to the dom-3 constraint.

    Maturity: 2

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Contained resource referenced by expression
    ... extension 0..0 Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/referencesContained"
    ... value[x] 1..1 Reference() Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..* Extension Contained resource referenced by expression
    ... 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/referencesContained"

    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 represented a little differently in R3:

    • Remove the extension context Expression
    • Note: Extensions that have been modified for R3 are still draft while real-world experience is collected
    Name Flags Card. Type Description & Constraints      Filter: Filters doco
    . . Extension 0..* Extension Contained resource referenced by expression
    . . . extension 0 .. 0 Extension
    . . . url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/referencesContained"
    . . . value[x] 1.. 1 Reference () Value of extension

    doco Documentation for this format

    Search Parameters for this Extension

    (none found)