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: Artifact Version Algorithm

Official URL: http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm Version: 5.4.0
Standards status: Trial-use Maturity Level: 1 Responsible: HL7 International / Clinical Decision Support Computable Name: ArtifactVersionAlgorithm
Other Identifiers: OID:2.16.840.1.113883.4.642.5.1738

Indicates the mechanism used to compare versions to determine which is more current.

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:

  • Only 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 string, Coding: Indicates the mechanism used to compare versions to determine which is more current.

    Maturity: 1

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension How to compare versions
    Extension.extension 0..0 Extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm"
    Extension.value[x] 1..1 Value of extension
    Extension.value[x].valueString string
    Extension.value[x].valueCoding Coding
    Extension.Slices for value[x].value[x]:valueCoding 0..1 Coding Value of extension
    Binding: VersionAlgorithm (extensible)

    doco Documentation for this format
    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension How to compare versions
    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/artifact-versionAlgorithm"
    Extension.Slices for value[x] 1..1 Value of extension
    Slice: Unordered, Closed by type:$this
    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them Other type slices that contain no new information are not shown in this view
    Extension.Slices for value[x].valueString string
    Extension.Slices for value[x].valueCoding Coding
    Extension.Slices for value[x].value[x]:valueCoding 0..1 Coding Value of extension
    Binding: VersionAlgorithm (extensible)

    doco Documentation for this format

    This structure is derived from Extension

    Summary

    Simple Extension with the type string, Coding: Indicates the mechanism used to compare versions to determine which is more current.

    Maturity: 1

    Differential View

    This structure is derived from Extension

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension How to compare versions
    Extension.extension 0..0 Extension
    Extension.url 1..1 uri "http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm"
    Extension.value[x] 1..1 Value of extension
    Extension.value[x].valueString string
    Extension.value[x].valueCoding Coding
    Extension.Slices for value[x] Content/Rules for all slices
    Extension.Slices for value[x].value[x]:valueCoding 0..1 Coding Value of extension
    Binding: VersionAlgorithm (extensible)

    doco Documentation for this format

    Snapshot View

    NameFlagsCard.TypeDescription & Constraints    Filter: doco
    Extension 0..1 Extension How to compare versions
    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/artifact-versionAlgorithm"
    Extension.Slices for value[x] 1..1 Value of extension
    Slice: Unordered, Closed by type:$this
    Slicing Note: The rules on this element (including its children) apply to all the slices, but are not repeated in them Other type slices that contain no new information are not shown in this view
    Extension.Slices for value[x].valueString string
    Extension.Slices for value[x].valueCoding Coding
    Extension.Slices for value[x].value[x]:valueCoding 0..1 Coding Value of extension
    Binding: VersionAlgorithm (extensible)

    doco Documentation for this format

     

    Other representations of profile: CSV, Excel, Schematron

    Terminology Bindings

    Path Status Usage ValueSet Version Source
    Extension.value[x]:valueCoding Base extensible Version Algorithm 📦5.0.0 FHIR Std.

    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 ArtifactAssessment (not for this version)
    • Remove the extension context ConditionDefinition (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 How to compare versions
    Extension. extension 0 .. 0 Extension
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm"
    Extension. value[x] 1.. 1 Value of extension
    Extension.value[x]. valueString string
    Extension.value[x]. valueCoding Coding
    Extension. Slices for value[x] Content/Rules for all slices
    Extension.Slices for value[x]. value[x]:valueCoding 0 .. 1 Coding Value of extension
    Binding: VersionAlgorithm ( extensible )

    doco Documentation for this format

    R4

    The extension is represented a little differently in R4:

    • Remove the extension context ArtifactAssessment (not for this version)
    • Remove the extension context ClinicalUseDefinition (not for this version)
    • Remove the extension context ConditionDefinition (not for this version)
    • Remove the extension context SubstanceDefinition (not for this version)
    • Remove the extension context SubscriptionTopic (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 How to compare versions
    Extension. extension 0 .. 0 Extension
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm"
    Extension. value[x] 1.. 1 Value of extension
    Extension.value[x]. valueString string
    Extension.value[x]. valueCoding Coding
    Extension. Slices for value[x] Content/Rules for all slices
    Extension.Slices for value[x]. value[x]:valueCoding 0 .. 1 Coding Value of extension
    Binding: VersionAlgorithm ( extensible )

    doco Documentation for this format

    R3

    The extension is represented a little differently in R3:

    • Remove the extension context ArtifactAssessment (not for this version)
    • Remove the extension context ClinicalUseDefinition (not for this version)
    • Remove the extension context ConditionDefinition (not for this version)
    • Remove the extension context DeviceDefinition (not for this version)
    • Remove the extension context ExampleScenario (not for this version)
    • Remove the extension context MedicationKnowledge (not for this version)
    • Remove the extension context ObservationDefinition (not for this version)
    • Remove the extension context SpecimenDefinition (not for this version)
    • Remove the extension context SubstanceDefinition (not for this version)
    • Remove the extension context SubscriptionTopic (not for this version)
    • Remove the extension context TerminologyCapabilities (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 How to compare versions
    Extension. extension 0 .. 0 Extension
    Extension. url 1 .. 1 uri "http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm"
    Extension. value[x] 1.. 1 Value of extension
    Extension.value[x]. valueString string
    Extension.value[x]. valueCoding Coding
    Extension. Slices for value[x] Content/Rules for all slices
    Extension.Slices for value[x]. value[x]:valueCoding 0 .. 1 Coding Value of extension
    Binding: VersionAlgorithm ( extensible )

    doco Documentation for this format

    Search Parameters for this Extension

    (none found)