This is the ValueSet that contains all the codes in WOF-Base Booking Confirmation Characteristic (http://canonical.fhir.link/servicewell/wof-connect/ValueSet/wc-characteristic-booking-confirmation) and WOF-Base Booking Confirmation Characteristic (http://canonical.fhir.link/servicewell/wof-connect/ValueSet/wc-characteristic-booking-confirmation). E.g. what you have to deal with if you get resources containing codes in either of them