## Union of http://hl7.org/fhir/uv/order-catalog/StructureDefinition/CatalogReference and http://hl7.org/fhir/uv/order-catalog/StructureDefinition/CatalogReference

This is the set of resources that conform to either of the profiles Reference to a catalog (http://hl7.org/fhir/uv/order-catalog/StructureDefinition/CatalogReference) and Reference to a catalog (http://hl7.org/fhir/uv/order-catalog/StructureDefinition/CatalogReference). E.g. what you have to deal with if you get resources conforming to one of them

### Structure

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* |  | left: Extension; right: Reference to a catalog
extension |  | 0..* | Extension | left: Additional content defined by implementations; right: Extension
url |  | 1..1 | uri | identifies the meaning of the extension
value[x] |  | 0..1 | Reference(Catalog Header | #sd+5-CatalogHeader-CatalogHeader) {r} | Reference to a catalog containing this item
Documentation for this format