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Handbook on Ontologies
Attempts to combine some sort of rules with a description logic go back at least as far as the Classic system  . Starting in the late 1990s, there were a number of attempts to combine Datalog (as the premier deductive database language) with description logics; notable examples include AL-log  and CARIN  . While partially motivated by the desire to increase the expressive power of both components, these attempts (esp. AL-log) at hybrid systems were strongly constrained by the desiredoi:10.1007/978-3-540-92673-3_5 dblp:series/ihis/HitzlerP09 fatcat:3v5zvvkh45dlndxi4334lab2nm