description: This cross-version extension represents ImmunizationRecommendation.recommendation.protocol.doseSequence from http://hl7.org/fhir/StructureDefinition/ImmunizationRecommendation|1.0.2 for use in FHIR R5. package_name: hl7.fhir.uv.xver-r2.r5 derivation: constraint name: ext_R2_IR_re_pr_doseSequence type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Dose number within sequence choices: [valueInteger] index: 1 valueInteger: base: {path: 'Extension.value[x]'} type: integer short: Dose number within sequence choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-ImmunizationRecommendation.recommendation.protocol.doseSequence'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-ImmunizationRecommendation.recommendation.protocol.doseSequence base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]