Tableau-based Forgetting in ALC Ontologies
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In this paper, we propose two new approaches to forgetting for [Ascr ][Lscr ][Cscr ] based on the well-known tableau algorithm. The first approach computes the result of forgetting by rolling up tableaux, and also provides a decision algorithm for the existence of forgetting in [Ascr ][Lscr ][Cscr ]. When the result of forgetting does not exist, we provide an incremental method for computing approximations of forgetting. This second approach uses variable substitution to refine approximations of forgetting and eventually obtain the result of forgetting. This approach is capable of preserving structural information of the original ontologies enabling readability and comparison. As both approaches are based on the tableau algorithm, their implementations can make use of the mechanisms and optimization techniques of existing description logic reasoners.
ECAI 2010 - 19th European Conference on Artificial Intelligence
© 2010 IOS Press. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the publisher website for access to the definitive, published version.
Artificial Intelligence and Image Processing not elsewhere classified