description: 'Extension: eine Referenz zum Biomaterial' package_name: de.dktk.oncology derivation: constraint name: Specimen type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://dktk.dkfz.de/fhir/StructureDefinition/onco-core-Extension-Specimen'} index: 1 value: choices: [valueReference] index: 3 valueReference: type: Reference choiceOf: value refers: ['https://fhir.bbmri.de/StructureDefinition/Specimen'] index: 4 package_version: 1.0.4 extensions: {} class: extension kind: complex-type url: http://dktk.dkfz.de/fhir/StructureDefinition/onco-core-Extension-Specimen base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.9.0