description: This cross-version extension represents Evidence.studyType from http://hl7.org/fhir/StructureDefinition/Evidence|4.3.0 for use in FHIR R4. package_name: rs/hl7.fhir.uv.xver derivation: constraint name: ext_R4B_Evidence_studyType type: Extension elements: value: base: {path: 'Extension.value[x]'} short: The type of study that produced this evidence choices: [valueCodeableConcept] index: 1 valueCodeableConcept: base: {path: 'Extension.value[x]'} type: CodeableConcept short: The type of study that produced this evidence choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-Evidence.studyType'} type: uri index: 3 package_version: r4b.r4-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-Evidence.studyType base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]