This page is part of the FHIR Specification (v4.1.0: Release 4B Ballot #1). 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

• Content
• Detailed Descriptions
• Mappings
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• JSON

Extension: changeBase

URL for this extension:

http://hl7.org/fhir/StructureDefinition/list-changeBase

Status: draft. Extension maintained by: HL7

Reference to the List that a "change" list is asserting changes with respect to.

Comment:

Only for mode = changes.

Context of Use: Use on Element ID List, with Context Invariant = mode = 'changes'

Extension Content

• Summary
• Full Structure
• XML
• JSON
• All

Summary

Name	Flags	Card.	Type	Description & Constraints
changeBase		0..1	Reference(List)	URL = http://hl7.org/fhir/StructureDefinition/list-changeBase changeBase: Reference to the List that a "change" list is asserting changes with respect to. Use on Element ID List, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>mode = 'changes'</code>
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/list-changeBase changeBase: Reference to the List that a "change" list is asserting changes with respect to. Use on Element ID List, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>mode = 'changes'</code>
extension		0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/list-changeBase"
value[x]		1..1	Reference(List)	Value of extension
Documentation for this format

XML Template

<!-- changeBase -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/list-changeBase" >
  <!-- from Element: extension -->
 <valueReference><!--  1..1 Reference(List) Value of extension --></valueReference>
</extension>

JSON Template

{ // changeBase
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/list-changeBase", // R! 
    "valueReference" : { Reference(List) } // C? R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
changeBase		0..1	Reference(List)	URL = http://hl7.org/fhir/StructureDefinition/list-changeBase changeBase: Reference to the List that a "change" list is asserting changes with respect to. Use on Element ID List, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>mode = 'changes'</code>
Documentation for this format

Full Structure

Name	Flags	Card.	Type	Description & Constraints
extension		0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/list-changeBase changeBase: Reference to the List that a "change" list is asserting changes with respect to. Use on Element ID List, with <a href="structuredefinition-definitions.html#StructureDefinition.contextInvariant">Context Invariant</a> = <code>mode = 'changes'</code>
extension		0..0
url		1..1	uri	"http://hl7.org/fhir/StructureDefinition/list-changeBase"
value[x]		1..1	Reference(List)	Value of extension
Documentation for this format

XML Template

<!-- changeBase -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/list-changeBase" >
  <!-- from Element: extension -->
 <valueReference><!--  1..1 Reference(List) Value of extension --></valueReference>
</extension>

JSON Template

{ // changeBase
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/list-changeBase", // R! 
    "valueReference" : { Reference(List) } // C? R! Value of extension
  }

Constraints

• ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (xpath: @value|f:*|h:div|self::f:Parameters)
• 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)