description: The accuracy of a measurable quantity. package_name: hl7.fhir.uv.phd derivation: constraint name: Accuracy type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy'} type: uri index: 1 value: choices: [valueQuantity] index: 3 valueQuantity: {type: Quantity, choiceOf: value, index: 4} value[x]: elements: value: {index: 5} unit: {index: 6} package_version: 2.0.0-ballot2 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/uv/phd/StructureDefinition/Accuracy base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0-ballot2 required: [value, valueQuantity]