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