New Ontological Alignment System Based on a Non-monotonic Description Logic

The choice of the representation formalism of the knowledge manipulated on the Web thanks to the ontologies is a crucial point which can conditioned their use. We must be capable of assuring a maximum of expressiveness in the definition of ontologies’ concepts and relations by taking into account the normal context aspect and the exception one. The second very important point is the simultaneous use of several ontologies in a purpose of sharing information. This use became possible thanks to the ontology alignment. It is based on the syntactic, semantic and structural similarities of the different input ontologies. To write the ontology concepts, we propose in this work, a non-monotonic description logic whose semantics is algebraic-based. Then, based on this representation formalism, we show how to improve the measure used to compute the structural similarity.