This is the ValueSet that contains all the codes in x_BasicConfidentialityKind (http://terminology.hl7.org/ValueSet/v3-xBasicConfidentialityKind) and x_BasicConfidentialityKind (http://terminology.hl7.org/ValueSet/v3-xBasicConfidentialityKind). E.g. what you have to deal with if you get resources containing codes in either of them