{description: Data Element for Reference.identifier, package_name: hl7.fhir.r4b.elements, derivation: specialization, name: Reference.identifier, type: Reference.identifier, package_version: 4.3.0, class: logical, kind: logical, url: 'http://hl7.org/fhir/StructureDefinition/de-Reference.identifier', base: 'http://hl7.org/fhir/StructureDefinition/Element', version: 4.3.0}