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Bisimulation-Based Concept Learning in Description Logics

Tran T.-L., Ha Q.-T., Hoang T.-L.-G., Nguyen L. A., Nguyen H. S.

Fundamenta Informaticae

2014

Vol. 133, nr 2/3

287--303

Concept learning in description logics (DLs) is similar to binary classification in traditional machine learning. The difference is that in DLs objects are described not only by attributes but also by binary relationships between objects. In this paper, we develop the first bisimulation-based method of concept learning in DLs for the following setting: given a knowledge base KB in a DL, a set of objects standing for positive examples and a set of objects standing for negative examples, learn a concept C in that DL such that the positive examples are instances of C w.r.t. KB, while the negative examples are not instances of C w.r.t. KB. We also prove soundness of our method and investigate its C-learnability.