Union of http://hl7.org/fhir/uv/order-catalog/CodeSystem/catalog-message-events and http://hl7.org/fhir/uv/order-catalog/CodeSystem/catalog-message-events

This is the CodeSystem that contains all the codes in Catalog Message Event Codes (http://hl7.org/fhir/uv/order-catalog/CodeSystem/catalog-message-events) and Catalog Message Event Codes (http://hl7.org/fhir/uv/order-catalog/CodeSystem/catalog-message-events). E.g. what you have to deal with if you get resources containing codes in either of them

CodeSystem

Generated Narrative: CodeSystem a9a9fb2c-0699-4af7-b6c1-5323f3949098-2

This code system http://hl7.org/fhir/comparison/CodeSystem/a9a9fb2c-0699-4af7-b6c1-5323f3949098-2 defines codes, but no codes are represented here

CodeDisplayDefinition
full-catalog full catalog for the recipientThe content of the message represents a full catalog that the message recepient is expected to take as is, replacing any preexisting content for this catalog.
update-catalog update for a catalog of the recipientThe content of the message represents an update to an existing catalog of the message recepient who is expected to integrate this update.