description: A canonical reference to a StructureDefinition that this is derived from. This is a de-normalization of a chain of StructureDefinition.baseDefinition.
package_name: hl7.fhir.uv.extensions
derivation: constraint
name: SDAncestor
type: Extension
elements:
  extension: {index: 0}
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/structuredefinition-ancestor'}
    index: 1
  value:
    choices: [valueUri]
    index: 3
  valueUri: {type: uri, choiceOf: value, index: 4}
package_version: 5.3.0-ballot
extensions: {}
class: extension
kind: complex-type
url: http://hl7.org/fhir/StructureDefinition/structuredefinition-ancestor
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 5.3.0-ballot
required: [valueUri, value]