This is the ValueSet that contains all the codes in CH SMC - Attached Document Type (http://fhir.ch/ig/ch-epl/ValueSet/ch-SMC-attached-document-type) and CH SMC - Attached Document Type (http://fhir.ch/ig/ch-epl/ValueSet/ch-SMC-attached-document-type). E.g. what you have to deal with if you get resources containing codes in either of them