10.5.2 Covering by subconceptsIn addition to disjointness, it is natural to consider whether some set of subclasses fully covers the superclass. For example, we might want to say that Circulating material must be either short-term or long-term.For DLs that support concept disjunction, this is easy:Circulating v (or ShortTerm LongTerm)Note that since ShortTerm, in turn, has Circulating as a superclass, the possibility arises of modeling Circulating as a definition:Circulating . (or ShortTerm LongTerm)However, this approach is not available for languages like Classic, which avoid disjunction in order to gain tractable reasoning. We discuss in the next section an approach to the problem based on subconcept definitions and enumerated values.
đang được dịch, vui lòng đợi..
