description: The official source of information held about a patient. package_name: fhir.org.nz.ig.base derivation: constraint name: Information_source type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org.nz/fhir/StructureDefinition/information-source'} type: uri index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: 2.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org.nz/fhir/StructureDefinition/information-source base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.1.0