R4 Ballot #2 (Mixed Normative/Trial use)

This page is part of the FHIR Specification (v3.5.0: R4 Ballot #2). 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

Extension: hierarchy

FHIR Infrastructure Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy

Status: draft. Extension maintained by: Health Level Seven, Inc. - [WG Name] WG

For circular references (references back to the same type of resource): whether they are allowed to transitively point back to the same instance (false), or whether the relationship must be a strict one-way hierarchy (true).

Context of Use: Use on Element ID ElementDefinition.type

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

Summary

Name	Flags	Card.	Type	Description & Constraints
hierarchy		0..1	boolean	URL = http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy hierarchy: For circular references (references back to the same type of resource): whether they are allowed to transitively point back to the same instance (false), or whether the relationship must be a strict one-way hierarchy (true). Use on Element ID ElementDefinition.type
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy hierarchy: For circular references (references back to the same type of resource): whether they are allowed to transitively point back to the same instance (false), or whether the relationship must be a strict one-way hierarchy (true). Use on Element ID ElementDefinition.type
extension	0..0
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy"
valueBoolean	0..1	boolean	Value of extension
Documentation for this format

XML Template

<!-- hierarchy -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy" >
  <!-- from Element: extension -->
 <valueBoolean value="[boolean]"/><!-- 0..1 Value of extension -->
</extension>

JSON Template

{ // hierarchy
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy", // R! 
    "valueBoolean" : <boolean> //Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
hierarchy		0..1	boolean	URL = http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy hierarchy: For circular references (references back to the same type of resource): whether they are allowed to transitively point back to the same instance (false), or whether the relationship must be a strict one-way hierarchy (true). Use on Element ID ElementDefinition.type
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy hierarchy: For circular references (references back to the same type of resource): whether they are allowed to transitively point back to the same instance (false), or whether the relationship must be a strict one-way hierarchy (true). Use on Element ID ElementDefinition.type
extension	0..0
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy"
valueBoolean	0..1	boolean	Value of extension
Documentation for this format

XML Template

<!-- hierarchy -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy" >
  <!-- from Element: extension -->
 <valueBoolean value="[boolean]"/><!-- 0..1 Value of extension -->
</extension>

JSON Template

{ // hierarchy
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy", // R! 
    "valueBoolean" : <boolean> //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')]))