This is the ValueSet that contains all the codes in Include Associated Data Value Set (http://hl7.org/fhir/uv/bulkdata/ValueSet/include-associated-data) and Include Associated Data Value Set (http://hl7.org/fhir/uv/bulkdata/ValueSet/include-associated-data). E.g. what you have to deal with if you get resources containing codes in either of them