This is the ValueSet that contains all the codes in MedComMessagingActivityCodes (http://medcomfhir.dk/ig/terminology/ValueSet/medcom-messaging-activityCodes) and MedComMessagingActivityCodes (http://medcomfhir.dk/ig/terminology/ValueSet/medcom-messaging-activityCodes). E.g. what you have to deal with if you get resources containing codes in either of them