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Hybrid Inferences in KL-ONE-based Knowledge Representation Systems

Bernhard Hollunder
DFKI, DFKI Research Reports (RR), Vol. 90-06, 1990.


We investigate algorithms for hybrid inferences in KL-ONE-based knowledge representation systems. Those systems employ two kinds of formalisms: the terminological and the assertional formalism. The terminological formalism consists of a concept description language to define concepts and relations between concepts for describing a terminology. On the other hand, the assertional formalism allows to introduce objects, which are instances of concepts and relations of a terminology. We present algorithms for hybrid inferences such as - determining subsumption between concepts - checking the consistency of such a knowledge base - computing the most specialized concepts an object is instance of - computing all objects that are instances of a certain concept.