This is the ValueSet that contains all the codes in Practice Setting Code Value Set (http://hl7.org/fhir/ValueSet/c80-practice-codes) and MII VS Dokument Fachgebiet (https://www.medizininformatik-initiative.de/fhir/ext/modul-dokument/ValueSet/mii-vs-dokument-fachgebiet). E.g. what you have to deal with if you get resources containing codes in either of them