description: 'R4B: `Immunization.recorded` (new:dateTime)' package_name: hl7.fhir.uv.xver-r4b.r5 derivation: constraint name: ExtensionImmunization_Recorded type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-Immunization.recorded'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: When the immunization was first captured in the subject's record choices: [valueDateTime] index: 2 valueDateTime: short: When the immunization was first captured in the subject's record type: dateTime base: {max: '1', min: 0, path: 'Extension.value[x]'} choiceOf: value index: 3 package_version: 0.1.0 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-Immunization.recorded base: http://hl7.org/fhir/StructureDefinition/Extension|5.0.0 version: 0.1.0 required: [url]