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