description: 'Extension: Principal Unit' package_name: rs/il.fhir.r4.dgmc derivation: constraint name: PrincipalUnit type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://fhir.dgmc.health.gov.il/StructureDefinition/primary-practitionerrole'} type: uri index: 1 value: choices: [valueReference] index: 3 valueReference: {type: Reference, choiceOf: value, index: 4} package_version: 0.1.6 extensions: {} class: extension kind: complex-type url: http://fhir.dgmc.health.gov.il/StructureDefinition/primary-practitionerrole base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.1.6 required: [value, valueReference]