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.core
derivation: constraint
name: hierarchy
type: Extension
elements:
  extension: {index: 0}
  url:
    type: uri
    pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy'}
    index: 1
  valueBoolean: {type: boolean, index: 2}
package_version: 3.5.0
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/structuredefinition-hierarchy
base: http://hl7.org/fhir/StructureDefinition/Extension
version: null