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