This is the ValueSet that contains all the codes in Release Mechanism Terminology (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/pqcmc-release-mechanism) and Release Mechanism Terminology (http://hl7.org/fhir/us/pq-cmc-fda/ValueSet/pqcmc-release-mechanism). E.g. what you have to deal with if you get resources containing codes in either of them