R4 Draft for Comment

This page is part of the FHIR Specification (v3.2.0: R4 Ballot 1). 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 R3

Extension: unit

FHIR Infrastructure Work Group Maturity Level: 1InformativeUse Context: Any

URL for this extension: 

http://hl7.org/fhir/StructureDefinition/questionnaire-unit

Status: draft. Extension maintained by: HL7

Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses.

Context of Use: Use on element: Questionnaire.item, Questionnaire.item.item

usage info: insert a list of places where this extension is used

Extension Content

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1CodingURL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses.
Use on element: Questionnaire.item, Questionnaire.item.item

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses.
Use on element: Questionnaire.item, Questionnaire.item.item
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/questionnaire-unit"
... valueCoding 0..1CodingValue of extension

doco Documentation for this format

XML Template

<!-- unit -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-unit" >
  <!-- from Element: extension -->
 <valueCoding><!-- 0..1 Coding Value of extension --></valueCoding>
</extension>

JSON Template

{ // unit
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-unit", // R! 
    "valueCoding" : { Coding } //Value of extension
  }

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1CodingURL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses.
Use on element: Questionnaire.item, Questionnaire.item.item

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses.
Use on element: Questionnaire.item, Questionnaire.item.item
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/questionnaire-unit"
... valueCoding 0..1CodingValue of extension

doco Documentation for this format

XML Template

<!-- unit -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-unit" >
  <!-- from Element: extension -->
 <valueCoding><!-- 0..1 Coding Value of extension --></valueCoding>
</extension>

JSON Template

{ // unit
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-unit", // R! 
    "valueCoding" : { Coding } //Value of extension
  }

 

Constraints

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