This page is part of the FHIR Specification (v4.3.0: R4B - STU). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R4B R4

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Extension: concept-comments

URL for this extension:

http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments

Status: draft. Extension maintained by: HL7

A comment that explains how this code is used in this context (where the value set is expected to be used).

Comment:

This is used in various FHIR value sets to make comments on how particular codes are used when the formal definition is a little abstract or vague, but it's not clear whether it belongs in the actual value set resource.

Context of Use: Use on Element ID CodeSystem.concept

Extension Content

<!-- concept-comments -->doco 
<extension xmlns="http://hl7.org/fhir"
 url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments" >
 <!-- from Element: extension -->
 <valueString value="[string ]"/><!-- ?? 1..1 Value of extension -->
</extension>

{ // concept-comments
 // from Element: extension
 "extension" : [ //  sliced by value:url in the specified order, Open ]
 "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments", // R! 
 "valueString" : "<string >" // C? R! Value of extension
 }

<!-- concept-comments -->doco 
<extension xmlns="http://hl7.org/fhir"
 url="http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments" >
 <!-- from Element: extension -->
 <valueString value="[string ]"/><!-- ?? 1..1 Value of extension -->
</extension>

{ // concept-comments
 // from Element: extension
 "extension" : [ //  sliced by value:url in the specified order, Open ]
 "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments", // R! 
 "valueString" : "<string >" // C? R! Value of extension
 }

Constraints

• ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (xpath: @value|f:*|h:div|self::f:Parameters)
• ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')]))
• ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
• ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
• ele-1: On Extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.value[x]: @value|f:*|h:div)