The named classes in Protege are the classes which one integrates into the ontology (taxonomy) manually. These classes' superclasses are defined during their creation. The members (individuals) and subclasses of these classes have to be added manually. Defined classes, also called restrictions, define which individuals are elements of this class. A reasoner can automatically classify them as well a show relationships (superclasses, subclasses) to other classes in the ontology.