Limitations of the Expressive Power of RDF Schema(2) e Disjointness of classes Sometimes we wish to say that classes are disjoint(e.g. male and female) Boolean combinations of classes Sometimes we wish to build new classes by combining other classes using union, intersection and complement E.g. person is the disjoint union of the classes male and female 10 Chapter 4 A Semantic Web primerChapter 4 A Semantic Web Primer 10 Limitations of the Expressive Power of RDF Schema (2) ⚫ Disjointness of classes – Sometimes we wish to say that classes are disjoint (e.g. male and female) ⚫ Boolean combinations of classes – Sometimes we wish to build new classes by combining other classes using union, intersection, and complement – E.g. person is the disjoint union of the classes male and female