description: Extension for capturing the vaccination protocol description of an immunization. package_name: synapxe.sgcdi derivation: constraint name: immunizationDescription type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'https://fhir.synapxe.sg/StructureDefinition/ext-immunization-description'} index: 1 value: short: Vaccination protocol description choices: [valueString] index: 3 valueString: {type: string, short: Vaccination protocol description, choiceOf: value, index: 4} package_version: 1.2.2 extensions: {} class: extension kind: complex-type url: https://fhir.synapxe.sg/StructureDefinition/ext-immunization-description base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.2.2 required: [valueString, value]