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• Content
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Extension: Filter to apply when looking up references

URL for this extension:

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

Status: draft. Extension maintained by: HL7

Identifies a filter to apply when looking up candidate answers for the question.

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
• Full Structure
• XML
• JSON
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Summary

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	string	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter Filter to apply when looking up references: Identifies a filter to apply when looking up candidate answers for the question. Use on element: Questionnaire.item, Questionnaire.item.item
Documentation for this format

Fulle Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter Filter to apply when looking up references: Identifies a filter to apply when looking up candidate answers for the question. Use on element: Questionnaire.item, Questionnaire.item.item
extension		0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter"
valueString		1..1	string	Value of extension
Documentation for this format

XML Template

<!-- Filter to apply when looking up references -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter" >
  <!-- from Element: extension -->
 <valueString value="[string]"/><!-- 1..1 Value of extension -->
</extension>

JSON Template

{ // Filter to apply when looking up references
  // from Element: extension
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter", // R! 
    "valueString" : "<string>" // R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	string	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter Filter to apply when looking up references: Identifies a filter to apply when looking up candidate answers for the question. Use on element: Questionnaire.item, Questionnaire.item.item
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter Filter to apply when looking up references: Identifies a filter to apply when looking up candidate answers for the question. Use on element: Questionnaire.item, Questionnaire.item.item
extension		0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter"
valueString		1..1	string	Value of extension
Documentation for this format

XML Template

<!-- Filter to apply when looking up references -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter" >
  <!-- from Element: extension -->
 <valueString value="[string]"/><!-- 1..1 Value of extension -->
</extension>

JSON Template

{ // Filter to apply when looking up references
  // from Element: extension
    "url" : "http://hl7.org/fhir/StructureDefinition/questionnaire-referenceFilter", // R! 
    "valueString" : "<string>" // 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')]))
• inv-13: Allowed reference filter can only be specified for items of type 'reference' (xpath: parent::*/f:type/@value='reference')