description: null package_name: uk.nhsdigital.r4 derivation: constraint name: NHSDigitalReference type: Reference elements: identifier: {type: Identifier, index: 0} package_version: 2.5.1 class: complex-type kind: complex-type url: https://fhir.nhs.uk/StructureDefinition/NHSDigital-Reference base: http://hl7.org/fhir/StructureDefinition/Reference version: null