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: Is Selective

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-isSelective Version: 5.4.0
Standards status: Trial-use Maturity Level: 3 Responsible: HL7 International / Clinical Decision Support Computable Name: IsSelective
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1668

Allows a given data requirement to be identified as "selective", meaning that it can be used as an additive criteria to filter a population. A selective data requirement is guaranteed to define a subset (not necessarily proper) of the initial population of an artifact. If multiple data requirements are marked selective, they all apply (i.e. AND semantics).

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 boolean: Allows a given data requirement to be identified as "selective", meaning that it can be used as an additive criteria to filter a population. A selective data requirement is guaranteed to define a subset (not necessarily proper) of the initial population of an artifact. If multiple data requirements are marked selective, they all apply (i.e. AND semantics).

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Primary criteria?
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-isSelective"
    Extension.value[x] 1..1 boolean Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Primary criteria?
    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-isSelective"
    Extension.value[x] 1..1 boolean Value of extension

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type boolean: Allows a given data requirement to be identified as "selective", meaning that it can be used as an additive criteria to filter a population. A selective data requirement is guaranteed to define a subset (not necessarily proper) of the initial population of an artifact. If multiple data requirements are marked selective, they all apply (i.e. AND semantics).

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Primary criteria?
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-isSelective"
    Extension.value[x] 1..1 boolean Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension Primary criteria?
    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-isSelective"
    Extension.value[x] 1..1 boolean 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 unchanged in R4B

    R4

    The extension is unchanged in R4

    R3

    The extension is unchanged in R3

    Search Parameters for this Extension

    (none found)