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: CapabilityStatement Expectation

Official URL: http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation Version: 5.4.0
Standards status: Trial-use Maturity Level: 3 Computable Name: CSExpectation
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1049

Defines the level of expectation associated with a given system capability. See the capabilitystatement-prohibited modifier extension to set expectations to not support a feature.

Context of Use

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

Usage info

Usages:

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 code: Defines the level of expectation associated with a given system capability. See the capabilitystatement-prohibited modifier extension to set expectations to not support a feature.

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension.extension 0..0 Extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension.value[x] 1..1 code Value of extension
    Binding: ConformanceExpectation (required): Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension.value[x] 1..1 code Value of extension
    Binding: ConformanceExpectation (required): Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type code: Defines the level of expectation associated with a given system capability. See the capabilitystatement-prohibited modifier extension to set expectations to not support a feature.

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension.extension 0..0 Extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension.value[x] 1..1 code Value of extension
    Binding: ConformanceExpectation (required): Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension.id 0..1 id Unique id for inter-element referencing
    Extension.extension 0..0 Extension
    Slice: Unordered, Open by value:url

    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension.value[x] 1..1 code Value of extension
    Binding: ConformanceExpectation (required): Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Terminology Bindings

    Path Status Usage ValueSet Version Source
    Extension.value[x] Base required ConformanceExpectation 📦2.0.0 THO v7.4

    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 CapabilityStatement.acceptLanguage (not for this version)
    • Remove the extension context CapabilityStatement.rest.resource.conditionalPatch (not for this version)
    • Remove the extension context CapabilityStatement.messaging.reliableCache (not for this version)
    • Remove the extension context CapabilityStatement.messaging.supportedMessage (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..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension. extension 0 .. 0 Extension
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension. value[x] 1.. 1 code Value of extension
    Binding: ConformanceExpectation ( required ) : Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format

    R4

    The extension is represented a little differently in R4:

    • Remove the extension context CapabilityStatement.acceptLanguage (not for this version)
    • Remove the extension context CapabilityStatement.rest.resource.conditionalPatch (not for this version)
    • Remove the extension context CapabilityStatement.messaging.reliableCache (not for this version)
    • Remove the extension context CapabilityStatement.messaging.supportedMessage (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..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension. extension 0 .. 0 Extension
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension. value[x] 1.. 1 code Value of extension
    Binding: ConformanceExpectation ( required ) : Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format

    R3

    The extension is represented a little differently in R3:

    • Remove the extension context CapabilityStatement.acceptLanguage (not for this version)
    • Remove the extension context CapabilityStatement.imports (not for this version)
    • Remove the extension context CapabilityStatement.instantiates (not for this version)
    • Remove the extension context CapabilityStatement.rest.resource.conditionalPatch (not for this version)
    • Remove the extension context CapabilityStatement.rest.resource.operation (not for this version)
    • Remove the extension context CapabilityStatement.rest.resource.supportedProfile (not for this version)
    • Remove the extension context CapabilityStatement.messaging.reliableCache (not for this version)
    • Remove the extension context CapabilityStatement.messaging.supportedMessage (not for this version)
    • Remove the extension context SearchParameter.multipleOr (not for this version)
    • Remove the extension context SearchParameter.multipleAnd (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..1 Extension SHALL | SHOULD | MAY |SHOULD-NOT
    Extension. extension 0 .. 0 Extension
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/capabilitystatement-expectation"
    Extension. value[x] 1.. 1 code Value of extension
    Binding: ConformanceExpectation ( required ) : Indicates the degree of adherence to a specified behavior or capability expected for a system to be deemed conformant with a specification.

    doco Documentation for this format

    Search Parameters for this Extension

    (none found)