description: A human readable description of the validation tool that produced this OperationOutcome, including its version and when it was built. Validation results depend on the version of the tool that produced them, and a report can easily outlive - or be produced by - a build that is well out of date, so the tool records what it was here. The content is for human consumption; it is not intended to be parsed. package_name: hl7.fhir.uv.tools.r5 derivation: constraint name: ValidatorVersion type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/tools/StructureDefinition/validator-version'} index: 1 value: choices: [valueString] index: 3 valueString: {type: string, choiceOf: value, index: 4} package_version: 1.2.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/tools/StructureDefinition/validator-version base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.2.0 required: [valueString, value]