7 th International Workshop on Uncertainty Reasoning for the Semantic Web

This paper deals with the problem of building a common knowledge body for a set of domain ontologies in order to enable their sharing and integration in a collaborative framework. We propose a novel hierarchical algorithm for concept fuzzy set representation mediated by a reference ontology. In contrast to the original concept representations based on instances, this enables the application of methods of fuzzy logical reasoning in order to characterize and measure the degree of the relationships holding between concepts from different ontologies. We presenta an application of the approach in the multimedia domain.