Istituto di Scienza e Tecnologie dell'Informazione     
Straccia U. Uncertainty and description logic programs over lattices. 115-133 p. Elie Sanchez (ed.). New York: Elsevier, 2006.
It is generally accepted that knowledge based systems would be smarter if they can manage uncertainty. In this paper we extend Description Logics, well-known logics for managing structured knowledge, towards the management of uncertainty. We allow (i) to express that a sentence is not just true or false, but certain to some degree, which is taken from a certainty lattice; and (ii) combine the logic with annotated logic programming, in which the management of uncertainty is based on so-called annotation terms.
Subject Description logics lattice
I.2.4 Knowledge Representation Formalisms and Methods. Representationlanguages

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