description: The supplements or provides additional information for the target report. package_name: rs/hl7.fhir.uv.extensions.r4 derivation: constraint name: DRAddendumOf type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/diagnosticReport-addendumOf'} type: uri index: 1 value: choices: [valueReference] index: 3 valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/StructureDefinition/DiagnosticReport'] index: 4 package_version: 5.1.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/diagnosticReport-addendumOf base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.1.0 required: [value, valueReference]