description: null package_name: us-core-extensions.legacy.aidbox derivation: constraint name: birthsex type: Extension elements: url: pattern: {type: Url, value: 'http://hl7.org/fhir/us/core/StructureDefinition/us-core-birthsex'} index: 0 value: choices: [valueCode] index: 2 valueCode: {type: code, choiceOf: value, index: 3} package_version: 0.0.0 class: extension kind: complex-type url: http://hl7.org/fhir/us/core/StructureDefinition/us-core-birthsex base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [url, valueCode, value]