description: This cross-version extension represents PlanDefinition.action.dynamicValue.expression from http://hl7.org/fhir/StructureDefinition/PlanDefinition|3.0.2 for use in FHIR R4B. package_name: rs/hl7.fhir.uv.xver derivation: constraint name: ext_R3_PlanDefinition_ac_dy_expression type: Extension elements: value: base: {path: 'Extension.value[x]'} short: An expression that provides the dynamic value for the customization choices: [valueString] index: 1 valueString: base: {path: 'Extension.value[x]'} type: string short: An expression that provides the dynamic value for the customization choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/3.0/StructureDefinition/extension-PlanDefinition.action.dynamicValue.expression'} type: uri index: 3 package_version: r3.r4b-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/3.0/StructureDefinition/extension-PlanDefinition.action.dynamicValue.expression base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]