This is the ValueSet that contains all the codes in eCH-0046 Email Category (http://fhir.ch/ig/ch-core/ValueSet/ech-46-emailcategory) and eCH-0046 Email Category (http://fhir.ch/ig/ch-core/ValueSet/ech-46-emailcategory). E.g. what you have to deal with if you get resources containing codes in either of them