This language isn't known by ISOcat. This profile isn't known by ISOcat. This data type isn't known by ISOcat. This rule type isn't known by ISOcat. Only simple DCs can be values. A PID should be unique. A PID reference should be unique within a value domain. 1.2 container complex simple private candidate standard deprecated superseded All DCs should have an english language section with a definition and a name. Only one language section per language per DC. standardized name preferred name admitted name deprecated name superseded name container complex All conceptual domains of a complex DC should have the same data type. open For each profile a closed DC is a member there should be a profile specific conceptual domain. closed Only one profile specific conceptual domain per profile per DC. A profile specific conceptual domain can only exist for a profile the closed DC is a member of. A simple DC used as a value in a profile specific conceptual domain should be a member of that profile. A simple DC used as a value in a profile specific conceptual domain should be a member of that profile. closed Only one language section per language per DC. closed A value in a linguistic section related conceptual domain should already be an allowed value in one of the closed DCs conceptual domains. constrained Only one conceptual domain per rule type. constrained simple Only simple DCs can be parent DCs. A simple DCs can't be its own parent.