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Extension: maxValueSet

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

Summary

Defining URL:http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet
Version:5.0.0-cibuild
Name:maxValueSet
Title:null
Modifier:This extension is not a modifier extension
Status:draft
Definition:This acts as an overall 'required' binding for an element that already has a less restrictive binding. It is used when there is a desire to have a 'small' enumerable binding that meets most needs and where the overall value set that the codes must be drawn from is 'infinite'. The the base less restrictive binding SHALL be a proper subset of the max binding valueset. In most cases, this extension is used where the base binding is 'extensible'.
Committee:FHIR Infrastructure Work Group

Status: draft. Extension maintained by: Health Level Seven, Inc. - FHIR Core WG

This acts as an overall 'required' binding for an element that already has a less restrictive binding. It is used when there is a desire to have a 'small' enumerable binding that meets most needs and where the overall value set that the codes must be drawn from is 'infinite'. The the base less restrictive binding SHALL be a proper subset of the max binding valueset. In most cases, this extension is used where the base binding is 'extensible'.

Comment:

Typically, this will be an entire code system, e.g. SNOMED CT. The maximum binding needs to include all the codes in the extensible or preferred binding.

Context of Use: Use on Element ID ElementDefinition.binding

Extension Content

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. maxValueSet0..1uri, canonical(ValueSet)URL = http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet
maxValueSet: This acts as an overall 'required' binding for an element that already has a less restrictive binding. It is used when there is a desire to have a 'small' enumerable binding that meets most needs and where the overall value set that the codes must be drawn from is 'infinite'. The the base less restrictive binding SHALL be a proper subset of the max binding valueset. In most cases, this extension is used where the base binding is 'extensible'.


Use on Element ID ElementDefinition.binding

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet
maxValueSet: This acts as an overall 'required' binding for an element that already has a less restrictive binding. It is used when there is a desire to have a 'small' enumerable binding that meets most needs and where the overall value set that the codes must be drawn from is 'infinite'. The the base less restrictive binding SHALL be a proper subset of the max binding valueset. In most cases, this extension is used where the base binding is 'extensible'.


Use on Element ID ElementDefinition.binding
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet"
... value[x] 1..1Value of extension
.... valueUriuri
.... valueCanonicalcanonical(ValueSet)

doco Documentation for this format

XML Template

<!-- maxValueSet -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet" >
  <!-- from Element: extension -->
 <value[x]><!-- I 1..1 uri|canonical Value of extension --></value[x]>
</extension>

JSON Template

{ // maxValueSet
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet", // R! 
  // value[x]: Value of extension. One of these 2:
    "valueUri" : "<uri>", // I R! Value of extension
    "valueCanonical" : "<canonical>" // I R! Value of extension
  }

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. maxValueSet0..1uri, canonical(ValueSet)URL = http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet
maxValueSet: This acts as an overall 'required' binding for an element that already has a less restrictive binding. It is used when there is a desire to have a 'small' enumerable binding that meets most needs and where the overall value set that the codes must be drawn from is 'infinite'. The the base less restrictive binding SHALL be a proper subset of the max binding valueset. In most cases, this extension is used where the base binding is 'extensible'.


Use on Element ID ElementDefinition.binding

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet
maxValueSet: This acts as an overall 'required' binding for an element that already has a less restrictive binding. It is used when there is a desire to have a 'small' enumerable binding that meets most needs and where the overall value set that the codes must be drawn from is 'infinite'. The the base less restrictive binding SHALL be a proper subset of the max binding valueset. In most cases, this extension is used where the base binding is 'extensible'.


Use on Element ID ElementDefinition.binding
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet"
... value[x] 1..1Value of extension
.... valueUriuri
.... valueCanonicalcanonical(ValueSet)

doco Documentation for this format

XML Template

<!-- maxValueSet -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet" >
  <!-- from Element: extension -->
 <value[x]><!-- I 1..1 uri|canonical Value of extension --></value[x]>
</extension>

JSON Template

{ // maxValueSet
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet", // R! 
  // value[x]: Value of extension. One of these 2:
    "valueUri" : "<uri>", // I R! Value of extension
    "valueCanonical" : "<canonical>" // I 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)

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Examples of this extension