This is the ValueSet that contains all the codes in IVR Valueset ambulance type (143.11.28) (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-ambulanceType) and IVR Ambulance Type (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-ambulanceType). E.g. what you have to deal with if you get resources containing codes in either of them