This is the ValueSet that contains all the codes in Graphical File Types (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/pqcmc-graphical-file-types) and Graphical File Types (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/pqcmc-graphical-file-types). E.g. what you have to deal with if you get resources containing codes in either of them