description: This cross-version extension represents GuidanceResponse.evaluationMessage from http://hl7.org/fhir/StructureDefinition/GuidanceResponse|4.3.0 for use in FHIR R5. package_name: hl7.fhir.uv.xver-r4b.r5 derivation: constraint name: ext_R4B_GuidanceResponse_evaluationMessage type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Messages resulting from the evaluation of the artifact or artifacts choices: [valueReference] index: 1 valueReference: short: Messages resulting from the evaluation of the artifact or artifacts refers: ['http://hl7.org/fhir/StructureDefinition/OperationOutcome'] type: Reference base: {path: 'Extension.value[x]'} choiceOf: value index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-GuidanceResponse.evaluationMessage'} index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-GuidanceResponse.evaluationMessage base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]