This is the ValueSet that contains all the codes in hl7VS-subtypeOfReferencedData (http://terminology.hl7.org/ValueSet/v2-notAllCodes-0291) and hl7VS-subtypeOfReferencedData (http://terminology.hl7.org/ValueSet/v2-notAllCodes-0291). E.g. what you have to deal with if you get resources containing codes in either of them