description: Information about the specific scale or assessment used to determine the value. This can be either just a code that represents the assessment scale or can be a reference to an Assessment Scale Collection. package_name: hl7.fhir.uv.symptoms derivation: constraint name: AssessmentScaleInformation type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/uv/symptoms/StructureDefinition/AssessmentScaleInformation'} index: 1 value: choices: [valueCodeableConcept, valueReference] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} valueReference: type: Reference choiceOf: value refers: ['http://hl7.org/fhir/uv/symptoms/StructureDefinition/AssessmentScaleCollection'] index: 5 package_version: 1.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/symptoms/StructureDefinition/AssessmentScaleInformation base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0-ballot