We describe DysToPic, a theorem prover for the preferen- tial Description Logic ALC +Tmin.This is a nonmonotonic extension of standard ALC based on a typicality operator T ,w hich enjoys ap refer- ential semantics. DysToPic is a multi-engine Prolog implementation of a labelled, two-phase tableaux calculus for ALC + Tmin whose basic idea is that of performing these two phases by different machines. The per- formances of DysToPic are promising, and significantly better than the ones of its predecessor PreDeLo 1.0 recently introduced.
['Laura Giordano', 'Valentina Gliozzi', 'Nicola Olivetti', 'Gian Luca Pozzato', 'Luca Violanti']
A Multi-engine Theorem Prover for a Description Logic of Typicality