description: The date the practitioner first became registered with the Responsible Authority or professional body package_name: fhir.org.nz.ig.base derivation: constraint name: RegistrationInitialDate type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org.nz/fhir/StructureDefinition/registration-initial-date'} type: uri index: 1 value: choices: [valueDate] index: 3 valueDate: {type: date, choiceOf: value, index: 4} package_version: 2.0.0 extensions: {} class: extension kind: complex-type url: http://hl7.org.nz/fhir/StructureDefinition/registration-initial-date base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0