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: Valueset Too Costly (Expansion Truncated)

Official URL: http://hl7.org/fhir/StructureDefinition/valueset-toocostly Version: 5.3.0-ballot-tc1
Standards status: Deprecated Maturity Level: 3 Responsible: HL7 International / Terminology Infrastructure Computable Name: VSTooCostly
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1189

Marks that the expansion is incomplete, because the full value set is too large to represent, and the client asked for an incomplete fragment. Used in STU3 and earlier terminology services. The information it provides should be communicated with operation outcome code = too-costly by a terminology server based on a more recent FHIR version.

Context of Use

This extension is deprecated and should no longer be used

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:

  • The resource metadata has changed (status)

    • 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: Marks that the expansion is incomplete, because the full value set is too large to represent, and the client asked for an incomplete fragment. Used in STU3 and earlier terminology services. The information it provides should be communicated with operation outcome code = too-costly by a terminology server based on a more recent FHIR version.

    Maturity: 3

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension The expansion is incomplete because the full expansion is too large
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-toocostly"
    ... value[x] 1..1 boolean Value of extension

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension The expansion is incomplete because the full expansion is too large
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-toocostly"

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type boolean: Marks that the expansion is incomplete, because the full value set is too large to represent, and the client asked for an incomplete fragment. Used in STU3 and earlier terminology services. The information it provides should be communicated with operation outcome code = too-costly by a terminology server based on a more recent FHIR version.

    Maturity: 3

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension The expansion is incomplete because the full expansion is too large
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-toocostly"
    ... value[x] 1..1 boolean Value of extension

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
    .. Extension 0..1 Extension The expansion is incomplete because the full expansion is too large
    ... id 0..1 id Unique id for inter-element referencing
    ... extension 0..0
    ... url 1..1 uri "http://hl7.org/fhir/StructureDefinition/valueset-toocostly"

    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)