description: Extension to define the side of the affected body region. package_name: ch.fhir.ig.ch-ems derivation: constraint name: CHEmsExtLaterality type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://fhir.ch/ig/ch-ems/StructureDefinition/ch-ems-ext-laterality'} index: 1 value: choices: [valueCodeableConcept] index: 3 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 4} package_version: 2.0.0-ballot extensions: {} class: extension kind: complex-type url: http://fhir.ch/ig/ch-ems/StructureDefinition/ch-ems-ext-laterality base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0-ballot required: [value, valueCodeableConcept]