Release 5 Ballot

This page is part of the FHIR Specification (v5.0.0-ballot: R5 Ballot - see ballot notes). 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 R2

Extension: maxOccurs

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

Summary

Defining URL:http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs
Version:5.0.0-ballot
Name:maxOccurs
Title:null
Modifier:This extension is not a modifier extension
Status:draft
Definition:The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited.
Committee:FHIR Infrastructure Work Group

Status: draft. Extension maintained by: HL7

The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited.

Comment:

Only relevant if the element has repeats=true and there's a need to constrain the number of allowed repetitions. See additional guidance and examples in the SDC implementation guide.

Context of Use: Use on Element ID Questionnaire.item or Element ID ElementDefinition, with Context Invariant = type!='display' and (repeats=true or %extension.valueInteger=1)

Extension Content

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. maxOccurs0..1integerURL = http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs
maxOccurs: The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited.


Use on Element ID Questionnaire.item or Element ID ElementDefinition, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type!='display' and (repeats=true or %extension.valueInteger=1)</code>

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs
maxOccurs: The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited.


Use on Element ID Questionnaire.item or Element ID ElementDefinition, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type!='display' and (repeats=true or %extension.valueInteger=1)</code>
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs"
... value[x] 1..1integerValue of extension

doco Documentation for this format

XML Template

<!-- maxOccurs -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs" >
  <!-- from Element: extension -->
 <valueInteger value="[integer]"/><!-- I 1..1 Value of extension -->
</extension>

JSON Template

{ // maxOccurs
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs", // R! 
    "valueInteger" : <integer> // I R! Value of extension
  }

Summary

NameFlagsCard.TypeDescription & Constraintsdoco
.. maxOccurs0..1integerURL = http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs
maxOccurs: The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited.


Use on Element ID Questionnaire.item or Element ID ElementDefinition, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type!='display' and (repeats=true or %extension.valueInteger=1)</code>

doco Documentation for this format

Full Structure

NameFlagsCard.TypeDescription & Constraintsdoco
.. extension0..1ExtensionURL = http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs
maxOccurs: The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited.


Use on Element ID Questionnaire.item or Element ID ElementDefinition, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>type!='display' and (repeats=true or %extension.valueInteger=1)</code>
... extension 0..0
... url 1..1uri"http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs"
... value[x] 1..1integerValue of extension

doco Documentation for this format

XML Template

<!-- maxOccurs -->doco

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs" >
  <!-- from Element: extension -->
 <valueInteger value="[integer]"/><!-- I 1..1 Value of extension -->
</extension>

JSON Template

{ // maxOccurs
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
  // extension: Extension: Prohibited
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs", // R! 
    "valueInteger" : <integer> // 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)

Search

No Search Extensions defined for this resource

Examples of this extension

No examples found.