FHIR Extensions Pack
5.4.0 - 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 5.4.0 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: Criteria Reference Extension

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference Version: 5.4.0
Standards status: Trial-use Maturity Level: 4 Responsible: HL7 International / Clinical Quality Information Computable Name: CriteriaReferenceExtension
Other Identifiers: OID:2.16.840.1.113883.4.642.40.97.42.33

Specifies which criteria is used as the input for calculations when there are multiple populations of the same type (such as continuous variable and ratio measures). The extension can also appear on evaluated resources and supplemental data to indicate which criteria the resource is associated with (i.e. which criteria was responsible for the reference to the resource). The reference SHALL be to the linkId of a criteria within the referenced measure. For backwards-compatibility, systems MAY support references to the id element of the criteria.

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 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

    Simple Extension with the type string: Specifies which criteria is used as the input for calculations when there are multiple populations of the same type (such as continuous variable and ratio measures). The extension can also appear on evaluated resources and supplemental data to indicate which criteria the resource is associated with (i.e. which criteria was responsible for the reference to the resource). The reference SHALL be to the linkId of a criteria within the referenced measure. For backwards-compatibility, systems MAY support references to the id element of the criteria.

    Maturity: 4

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Criteria reference
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension.value[x] 0..1 string Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Criteria reference
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension.value[x] 0..1 string Value of extension

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type string: Specifies which criteria is used as the input for calculations when there are multiple populations of the same type (such as continuous variable and ratio measures). The extension can also appear on evaluated resources and supplemental data to indicate which criteria the resource is associated with (i.e. which criteria was responsible for the reference to the resource). The reference SHALL be to the linkId of a criteria within the referenced measure. For backwards-compatibility, systems MAY support references to the id element of the criteria.

    Maturity: 4

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Criteria reference
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension.value[x] 0..1 string Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..* Extension Criteria reference
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension.value[x] 0..1 string Value of extension

    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 represented a little differently in R4B:

    • Remove the extension context MeasureReport.supplementalData (not for this version)
    • Note: Extensions that have been modified for R4B are still draft while real-world experience is collected
    Name Flags Card. Type Description & Constraints      Filter: doco
    Extension 0..* Extension Criteria reference
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension. value[x] 0 .. 1 string Value of extension

    doco Documentation for this format

    R4

    The extension is represented a little differently in R4:

    • Remove the extension context MeasureReport.supplementalData (not for this version)
    • Note: Extensions that have been modified for R4 are still draft while real-world experience is collected
    Name Flags Card. Type Description & Constraints      Filter: doco
    Extension 0..* Extension Criteria reference
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension. value[x] 0 .. 1 string Value of extension

    doco Documentation for this format

    R3

    The extension is represented a little differently in R3:

    • Remove the extension context MeasureReport.supplementalData (not for this version)
    • Remove the extension context MeasureReport.evaluatedResource (not for this version)
    • Note: Extensions that have been modified for R3 are still draft while real-world experience is collected
    Name Flags Card. Type Description & Constraints      Filter: doco
    Extension 0..* Extension Criteria reference
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/cqf-criteriaReference"
    Extension. value[x] 0 .. 1 string Value of extension

    doco Documentation for this format

    Search Parameters for this Extension

    (none found)