Fuzzy Protégé for Fuzzy Ontology Models

Fuzzy Protégé is a semi-automatic collaborative tool for the construction of fuzzy ontology models, built as a Protégé 3.3.1 tab plug-in. Fuzzy Protégé is an extension of the well known ontology editor Protégé for which we have defined new meta-classes to allow the definition of parameterized membership functions. Fuzzy Protégé also gives support to instantiate fuzzy concepts and roles and allows automatic computing of membership degrees. Finally, Fuzzy Protégé allows querying fuzzy ontologies based on fuzzy criteria. We present in this paper the internal architecture of Fuzzy protégé and we give some details on its implementation and the way we use it to build and validate fuzzy ontologies.