This is the ValueSet that contains all the codes in HpdAuditEventType (http://fhir.ch/ig/ch-epr-fhir/ValueSet/HpdAuditEventType) and HpdAuditEventType (http://fhir.ch/ig/ch-epr-fhir/ValueSet/HpdAuditEventType). E.g. what you have to deal with if you get resources containing codes in either of them