description: An extension that mimics the default FHIR `Resource.category` element that can be used if multiple categories need to be captured, while the cardinality of the core element is `0..1`. Resource types where this is the case are for example MedicationAdministration, MedicationDispense, MedicationStatement and Procedure. Note that in the current FHIR R5 build of these resource types, the cardinality of `.category` has been changed to `0..*`. package_name: nictiz.fhir.nl.r4.nl-core derivation: constraint name: ExtAdditionalCategory type: Extension elements: url: pattern: {type: uri, value: 'http://nictiz.nl/fhir/StructureDefinition/ext-AdditionalCategory'} type: uri index: 0 value: short: Category choices: [valueCodeableConcept] index: 2 valueCodeableConcept: {type: CodeableConcept, short: Category, choiceOf: value, index: 3} package_version: 0.12.0-beta.1 class: extension kind: complex-type url: http://nictiz.nl/fhir/StructureDefinition/ext-AdditionalCategory base: http://hl7.org/fhir/StructureDefinition/Extension version: null