FHIR Release 3 (STU) 4

This page is part of the FHIR Specification (v3.0.2: (v4.0.1: R4 - Mixed Normative and STU 3). ) in it's permanent home (it will always be available at this URL). 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 R4 R3

Extension: unit

FHIR Infrastructure Work Group   Maturity Level : 1 Informative Use 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. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource.

Comment :

The human-readable unit is conveyed as a display element. This element is for computation purposes.

Context of Use: Use on element: Questionnaire.item, Questionnaire.item.item usage info: insert a list of places where this extension is used Element ID Questionnaire.item or Element ID Questionnaire.item.item, with Context Invariant = type='integer' or type='decimal'

Extension Content

Summary

Name Flags Card. Type Description & Constraints doco
. . extension unit 0..1 Coding URL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource.


Use on element: Questionnaire.item, Questionnaire.item.item Element ID Questionnaire.item or Element ID Questionnaire.item.item, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type='integer' or type='decimal'</code>

doco Documentation for this format

Full Structure

Name Flags Card. Type Description & Constraints doco
. . extension 0..1 Extension URL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource.


Use on element: Questionnaire.item, Questionnaire.item.item Element ID Questionnaire.item or Element ID Questionnaire.item.item, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type='integer' or type='decimal'</code>
... extension I 0..0
. . . url 1..1 uri "http://hl7.org/fhir/StructureDefinition/questionnaire-unit" "http://hl7.org/fhir/StructureDefinition/questionnaire-unit"
. . valueCoding . value[x] I 0..1 1..1 Coding Value of extension

doco Documentation for this format

XML Template 

<!-- unit -->doco

< xmlns="http://hl7.org/fhir"

<extension xmlns="http://hl7.org/fhir"

     url="http://hl7.org/fhir/StructureDefinition/questionnaire-unit" >
  <!-- from Element: extension -->
 <</valueCoding>

 <valueCoding><!-- ?? 1..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 } // C? R! Value of extension

  }

Summary

Name Flags Card. Type Description & Constraints doco
. . extension unit 0..1 Coding URL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource.


Use on element: Questionnaire.item, Questionnaire.item.item Element ID Questionnaire.item or Element ID Questionnaire.item.item, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type='integer' or type='decimal'</code>

doco Documentation for this format

Full Structure

Name Flags Card. Type Description & Constraints doco
. . extension 0..1 Extension URL = http://hl7.org/fhir/StructureDefinition/questionnaire-unit
unit: Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource.


Use on element: Questionnaire.item, Questionnaire.item.item Element ID Questionnaire.item or Element ID Questionnaire.item.item, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type='integer' or type='decimal'</code>
... extension I 0..0
. . . url 1..1 uri "http://hl7.org/fhir/StructureDefinition/questionnaire-unit" "http://hl7.org/fhir/StructureDefinition/questionnaire-unit"
. . valueCoding . value[x] I 0..1 1..1 Coding Value of extension

doco Documentation for this format

XML Template 

<!-- unit -->doco

< xmlns="http://hl7.org/fhir"

<extension xmlns="http://hl7.org/fhir"

     url="http://hl7.org/fhir/StructureDefinition/questionnaire-unit" >
  <!-- from Element: extension -->
 <</valueCoding>

 <valueCoding><!-- ?? 1..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 } // C? R! 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')]) )
  • 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 )