This is the ValueSet that contains all the codes in IVR valueset role mission time (.143.11.10) (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-missionTimeRole) and IVR Mission Time Role (http://fhir.ch/ig/ch-ems/ValueSet/IVR-VS-missionTimeRole). E.g. what you have to deal with if you get resources containing codes in either of them