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• Content
• Detailed Descriptions
• Mappings
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• JSON

Extension: Where to find code system

URL for this extension:

http://hl7.org/fhir/StructureDefinition/valueset-systemRef

Status: draft. Extension maintained by: HL7

The formal URI for the code system. I.e. ValueSet.codeSystem.system (or its equivalent).

Context of Use: Use on element: ValueSet.compose.include

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

Extension Content

• Summary
• Full Structure
• XML
• JSON
• All

Summary

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	uri	URL = http://hl7.org/fhir/StructureDefinition/valueset-systemRef Where to find code system: The formal URI for the code system. I.e. ValueSet.codeSystem.system (or its equivalent). Use on element: ValueSet.compose.include
Documentation for this format

Fulle Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/valueset-systemRef Where to find code system: The formal URI for the code system. I.e. ValueSet.codeSystem.system (or its equivalent). Use on element: ValueSet.compose.include
extension		0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/valueset-systemRef"
valueUri		1..1	uri	Value of extension
Documentation for this format

XML Template

<!-- Where to find code system -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/valueset-systemRef" >
  <!-- from Element: extension -->
 <valueUri value="[uri]"/><!-- 1..1 Value of extension -->
</extension>

JSON Template

{ // Where to find code system
  // from Element: extension
    "url" : "http://hl7.org/fhir/StructureDefinition/valueset-systemRef", // R! 
    "valueUri" : "<uri>" // R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	uri	URL = http://hl7.org/fhir/StructureDefinition/valueset-systemRef Where to find code system: The formal URI for the code system. I.e. ValueSet.codeSystem.system (or its equivalent). Use on element: ValueSet.compose.include
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/valueset-systemRef Where to find code system: The formal URI for the code system. I.e. ValueSet.codeSystem.system (or its equivalent). Use on element: ValueSet.compose.include
extension		0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/valueset-systemRef"
valueUri		1..1	uri	Value of extension
Documentation for this format

XML Template

<!-- Where to find code system -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/valueset-systemRef" >
  <!-- from Element: extension -->
 <valueUri value="[uri]"/><!-- 1..1 Value of extension -->
</extension>

JSON Template

{ // Where to find code system
  // from Element: extension
    "url" : "http://hl7.org/fhir/StructureDefinition/valueset-systemRef", // R! 
    "valueUri" : "<uri>" // 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')]))