description: A description of the instance in an ImagingStudy. package_name: hl7.fhir.eu.imaging derivation: constraint name: ImagingStudyEuImagingInstanceDescription type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.eu/fhir/imaging/StructureDefinition/ImagingStudyEuImagingInstanceDescription'} index: 1 value: choices: [valueString] index: 3 valueString: {type: string, choiceOf: value, index: 4} package_version: 1.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.eu/fhir/imaging/StructureDefinition/ImagingStudyEuImagingInstanceDescription base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0-ballot