This is the ValueSet that contains all the codes in Guidance for Action (http://fhir.ch/ig/ch-rad-order/ValueSet/ch-rad-order-guidance-for-action) and Guidance for Action (http://fhir.ch/ig/ch-rad-order/ValueSet/ch-rad-order-guidance-for-action). E.g. what you have to deal with if you get resources containing codes in either of them