description: This extension allows the Client Registry to include historical birth dates in a single Patient resource. package_name: fhir.ca derivation: constraint name: BirthDateHistoryExtension type: Extension elements: extension: array: true min: 2 index: 0 slicing: slices: businessDates: match: {} schema: {type: Extension, mustSupport: true, url: 'http://hlth.gov.bc.ca/fhir/client/StructureDefinition/bc-business-period-extension', index: 1} min: 1 max: 1 birthDate: match: {} schema: mustSupport: true _required: true index: 2 extensions: {} elements: extension: {index: 3} url: pattern: {type: Uri, value: birthDate} index: 4 value: mustSupport: true choices: [valueDate] index: 6 valueDate: {type: date, mustSupport: true, choiceOf: value, index: 7} required: [value, valueDate] sourceID: match: {} schema: {type: Extension, mustSupport: true, url: 'http://hlth.gov.bc.ca/fhir/client/StructureDefinition/bc-sourceId-extension', index: 8} min: 0 max: 1 url: pattern: {type: Uri, value: 'http://hlth.gov.bc.ca/fhir/client/StructureDefinition/bc-birthdate-history-extension'} index: 9 value: choices: [] index: 11 package_version: bc.client-1.0.1 extensions: businessDates: {url: 'http://hlth.gov.bc.ca/fhir/client/StructureDefinition/bc-business-period-extension', min: 1, max: 1, type: Extension, mustSupport: true, index: 1} birthDate: url: null mustSupport: true _required: true index: 2 extensions: {} elements: extension: {index: 3} url: pattern: {type: Uri, value: birthDate} index: 4 value: mustSupport: true choices: [valueDate] index: 6 valueDate: {type: date, mustSupport: true, choiceOf: value, index: 7} required: [value, valueDate] sourceID: {url: 'http://hlth.gov.bc.ca/fhir/client/StructureDefinition/bc-sourceId-extension', min: 0, max: 1, type: Extension, mustSupport: true, index: 8} class: extension kind: complex-type url: http://hlth.gov.bc.ca/fhir/client/StructureDefinition/bc-birthdate-history-extension base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0