This is the ValueSet that contains all the codes in Description Acceptability Value Set (http://hl7.org/fhir/uv/termchangeset/ValueSet/description-acceptability-vs) and Designation Acceptability Value Set (http://hl7.org/fhir/uv/termchangeset/ValueSet/designation-acceptability-vs). E.g. what you have to deal with if you get resources containing codes in either of them