CodeSystem Change Set Exchange
1.0.0 - International flag

CodeSystem Change Set Exchange, published by HL7 International / Terminology Infrastructure. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/termchangeset-ig/ and changes regularly. See the Directory of published versions

Extension: Extends CodeSystem

Official URL: http://hl7.org/fhir/uv/termchangeset/StructureDefinition/extends-codesystem Version: 1.0.0
Standards status: Draft Draft as of 2025-10-10 Maturity Level: 0 Computable Name: ExtendsCodeSystem

Extends CodeSystem contains a reference to a source terminology, for which a CodeSystem resource is intended to contain additional Concepts

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

Formal Views of Extension Content

Description Differentials, Snapshots, and other representations.

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extends CodeSystem
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/termchangeset/StructureDefinition/extends-codesystem"
... value[x] 0..1 Reference(CodeSystem) The source terminology for which the Change Set is intended to contain additional Concepts

doco Documentation for this format
NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extends CodeSystem
... id 0..1 string Unique id for inter-element referencing
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/termchangeset/StructureDefinition/extends-codesystem"

doco Documentation for this format

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()

Summary

Simple Extension with the type Reference: Extends CodeSystem contains a reference to a source terminology, for which a CodeSystem resource is intended to contain additional Concepts

Maturity: 0

Differential ViewDifferential View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extends CodeSystem
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/termchangeset/StructureDefinition/extends-codesystem"
... value[x] 0..1 Reference(CodeSystem) The source terminology for which the Change Set is intended to contain additional Concepts

doco Documentation for this format

Snapshot View

NameFlagsCard.TypeDescription & Constraints    Filter: Filtersdoco
.. Extension 0..* Extension Extends CodeSystem
... id 0..1 string Unique id for inter-element referencing
... extension 0..0
... url 1..1 uri "http://hl7.org/fhir/uv/termchangeset/StructureDefinition/extends-codesystem"

doco Documentation for this format

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()

Summary

Simple Extension with the type Reference: Extends CodeSystem contains a reference to a source terminology, for which a CodeSystem resource is intended to contain additional Concepts

Maturity: 0

 

Other representations of profile: CSV, Excel, Schematron