FHIR Extensions Pack
5.3.0-ballot-tc1 - (September 2025 Ballot) International flag

This page is part of the FHIR Core Extensions Registry (v5.3.0-ballot-tc1: Release 5.3) based on FHIR (HL7® FHIR® Standard) v5.0.0. This version is a pre-release. The current official version is 5.2.0. For a full list of available versions, see the Directory of published versions

Extension: ReferenceFilter

Official URL: http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter Version: 5.3.0-ballot-tc1
Standards status: Deprecated Maturity Level: 3 Computable Name: ReferenceFilter
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1233

Identifies a filter to apply when looking up candidate answers for the question. DEPRECATED: This extension has been replaced by the Structured Data Capture candidateExpression extension.

Context of Use

This extension is deprecated and should no longer be used

This extension has been replaced by the Structured Data Capture candidateExpression extension

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

In addition, the extension can only be used when this FHIRPath expression is true:

ofType(ElementDefinition).type.exists(code='Reference') or where(%resource.is(Questionnaire)).exists(type.first()='reference')

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 string: Identifies a filter to apply when looking up candidate answers for the question. DEPRECATED: This extension has been replaced by the Structured Data Capture candidateExpression extension.

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Filter to apply when looking up references
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter"
    ... value[x] 1..1 string Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Filter to apply when looking up references
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type string: Identifies a filter to apply when looking up candidate answers for the question. DEPRECATED: This extension has been replaced by the Structured Data Capture candidateExpression extension.

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Filter to apply when looking up references
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter"
    ... value[x] 1..1 string Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Filter to apply when looking up references
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter"

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Constraints

    IdGradePath(s)DetailsRequirements
    ele-1error**ALL** elementsAll FHIR elements must have a @value or children
    : hasValue() or (children().count() > id.count())
    ext-1error**ALL** extensionsMust 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)