description: Live birth certificate number - this represents \"Birth Number\" on the US Standard Certificate of Live Birth. package_name: hl7.fhir.us.bfdr derivation: constraint name: ExtensionLiveBirthCertificateNumber type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/bfdr/StructureDefinition/Extension-live-birth-certificate-number'} index: 1 value: choices: [valueIdentifier] index: 3 valueIdentifier: {type: Identifier, choiceOf: value, index: 4} value[x]: elements: type: mustSupport: true pattern: type: CodeableConcept value: coding: - {code: BCT, system: 'http://terminology.hl7.org/CodeSystem/v2-0203'} index: 5 required: [type] package_version: 2.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/bfdr/StructureDefinition/Extension-live-birth-certificate-number base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0-ballot required: [valueIdentifier, value]