This is the ValueSet that contains all the codes in Qualifier Value (http://fhir.ch/ig/ch-rad-order/ValueSet/ch-rad-order-caveat-qualifier-value) and Qualifier Value (http://fhir.ch/ig/ch-rad-order/ValueSet/ch-rad-order-caveat-qualifier-value). E.g. what you have to deal with if you get resources containing codes in either of them