description: This cross-version extension represents PlanDefinition.action.definition[x] from http://hl7.org/fhir/StructureDefinition/PlanDefinition|4.0.1 for use in FHIR R5. package_name: hl7.fhir.uv.xver-r4.r5 derivation: constraint name: ext_R4_PlanDefinition_ac_definition type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Description of the activity to be performed choices: [valueCanonical, valueUri] index: 1 valueCanonical: base: {path: 'Extension.value[x]'} type: canonical short: Description of the activity to be performed choiceOf: value index: 2 valueUri: base: {path: 'Extension.value[x]'} type: uri short: Description of the activity to be performed choiceOf: value index: 3 url: pattern: {type: uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-PlanDefinition.action.definition'} type: uri index: 4 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.0/StructureDefinition/extension-PlanDefinition.action.definition base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]