description: null package_name: bonsai.first.test.r4 derivation: constraint name: NLLReference type: Reference elements: reference: {short: Reference, mustSupport: true, index: 0} package_version: 0.1.1 class: complex-type kind: complex-type url: http://electronichealth.se/fhir/StructureDefinition/NLLReference base: http://hl7.org/fhir/StructureDefinition/Reference version: 1.0.0 required: [reference]