Fuzzy Descriptions Logics with Fuzzy Truth Values

In Proceedings of the World Congress of the International Fuzzy Systems Association/European society for Fuzzy Logic and Technology (IFSA/EUSFLAT-09).

Fuzzy Description Logics are a family of logics which allow to deal with structured knowledge affected by vagueness. Although a relatively important amount of work has been carried out in the last years, current fuzzy DLs are open to be extend with several features worked out in the fuzzy logic literature. In this work, we extend fuzzy DLs with fuzzy truth values, allowing to state sentences such as ``Tina is young is almost true''.