description: This extension is used to augment a reference with the target resource category, in cases when `Reference.type` is not precise enough to determine the functional counterpart of the reference and `Reference.identifier` is used. The value of this extension is often a semantic code (e.g. the zib's root definition code) which identifies the target resource category. package_name: nictiz.fhir.nl.r4.medicationprocess9 derivation: constraint name: ExtResourceCategory type: Extension elements: url: pattern: {type: Uri, value: 'http://nictiz.nl/fhir/StructureDefinition/ext-ResourceCategory'} index: 0 value: choices: [valueCodeableConcept] index: 2 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3} package_version: 2.0.0-beta.6 class: extension kind: complex-type url: http://nictiz.nl/fhir/StructureDefinition/ext-ResourceCategory base: http://hl7.org/fhir/StructureDefinition/Extension version: 2.0.0-beta.6