This is the ValueSet that contains all the codes in Event Timings (http://fhir.ch/ig/ch-emed-epr/ValueSet/ch-emed-epr-event-timing) and Event Timings (http://fhir.ch/ig/ch-emed-epr/ValueSet/ch-emed-epr-event-timing). E.g. what you have to deal with if you get resources containing codes in either of them