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

This page is part of the FHIR Core Extensions Registry (v5.3.0-ballot: 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: Default Value

Official URL: http://hl7.org/fhir/StructureDefinition/cqf-defaultValue Version: 5.3.0-ballot
Standards status: Trial-use Maturity Level: 3 Responsible: HL7 International / Clinical Decision Support Computable Name: DefaultValue
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1660

Provides a default value for a parameter definition.

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:

  • 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, boolean, integer, decimal, date, dateTime, Coding, CodeableConcept, Period, Range, Quantity, Ratio: Provides a default value for a parameter definition.

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-defaultValue"
    ... value[x] 0..1 Value of extension
    .... valueString string
    .... valueBoolean boolean
    .... valueInteger integer
    .... valueDecimal decimal
    .... valueDate date
    .... valueDateTime dateTime
    .... valueCoding Coding
    .... valueCodeableConcept CodeableConcept
    .... valuePeriod Period
    .... valueRange Range
    .... valueQuantity Quantity
    .... valueRatio Ratio

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Extension
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-defaultValue"
    .... valueString string
    .... valueBoolean boolean
    .... valueInteger integer
    .... valueDecimal decimal
    .... valueDate date
    .... valueDateTime dateTime
    .... valueCoding Coding
    .... valueCodeableConcept CodeableConcept
    .... valuePeriod Period
    .... valueRange Range
    .... valueQuantity Quantity
    .... valueRatio Ratio

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type string, boolean, integer, decimal, date, dateTime, Coding, CodeableConcept, Period, Range, Quantity, Ratio: Provides a default value for a parameter definition.

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Extension
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-defaultValue"
    ... value[x] 0..1 Value of extension
    .... valueString string
    .... valueBoolean boolean
    .... valueInteger integer
    .... valueDecimal decimal
    .... valueDate date
    .... valueDateTime dateTime
    .... valueCoding Coding
    .... valueCodeableConcept CodeableConcept
    .... valuePeriod Period
    .... valueRange Range
    .... valueQuantity Quantity
    .... valueRatio Ratio

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension Extension
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..* Extension Additional content defined by implementations
    Slice: Unordered, Open by value:url
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/cqf-defaultValue"
    .... valueString string
    .... valueBoolean boolean
    .... valueInteger integer
    .... valueDecimal decimal
    .... valueDate date
    .... valueDateTime dateTime
    .... valueCoding Coding
    .... valueCodeableConcept CodeableConcept
    .... valuePeriod Period
    .... valueRange Range
    .... valueQuantity Quantity
    .... valueRatio Ratio

    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)