description: null package_name: gdrl.fhir.r4 derivation: constraint name: ReteLabEncounterServiceRequester type: Extension elements: url: pattern: {type: Uri, value: 'https://fhir.siss.regione.lombardia.it/StructureDefinition/ReteLabEncounterServiceRequester'} index: 0 value: choices: [valueReference] index: 2 valueReference: {type: Reference, choiceOf: value, index: 3} package_version: 1.3.1 class: extension kind: complex-type url: https://fhir.siss.regione.lombardia.it/StructureDefinition/ReteLabEncounterServiceRequester base: http://hl7.org/fhir/StructureDefinition/Extension version: null