description: '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).'
package_name: rs/hl7.fhir.r5.examples
derivation: constraint
name: hierarchy
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy'}
    type: uri
    index: 1
  value:
    choices: [valueBoolean]
    index: 3
  valueBoolean: {type: boolean, choiceOf: value, index: 4}
package_version: 5.0.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.0.0-ballot
required: [value, valueBoolean]