The organization of objects into classes and categories is an essential task in the process of forming concepts. Within computer science, this classification activity must be supported by a well-founded representation system; among the alternatives, ontologies appear as a particularly suitable choice. Classification has therefore an ontological nature, as it both defines a system of categories, in the philosophical sense, and is founded by some ontology, in the computational sense. However, there is an implicit duality; classes are both conceived within an ontological hierarchy and expressed as a linguistic structure. These often conflict. Our proposal is to tackle this problem by definining two orthogonal dimensions, namely an ontological one and a metalingistic one, to separate these perspectives. But once dimensions have been defined, some other proposals appear. For instance, different ontological hierarchies are perceived from different viewpoints and domains; a subjective dimensi...
María del Pilar Romay, Carlos E. Cuesta