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Inference-driven construction of valuation systems from first-order clauses

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2 Author(s)
Saffiotti, A. ; IRIDIA, Univ. Libre de Bruxelles, Belgium ; Umkehrer, E.

Network-based representations of uncertain knowledge are inherently propositional, and cannot easily accommodate generic, problem independent knowledge. A tremendous effort has been devoted in the knowledge representation community to develop languages that adequately represent different types of generic knowledge. The authors propose inference-driven construction as a means to use these languages for extending the expressiveness of uncertainty networks: they let a knowledge representation system represent generic knowledge and infer solutions to specific problem instances, and then copy the resulting inference structure to an uncertainty network that models these instances. From a dual perspective, inference-driven construction is a way of extending an existing knowledge representation system by attaching an uncertainty calculus to it. In this paper, the authors focus on one particular case of inference-driven construction: building Shenoy-Shafer's valuation systems from uncertain knowledge expressed in the form of first order clauses annotated by Dempster-Shafer's measures of belief. The authors detail an automatic construction procedure for this case, discuss a sample implementation, and provide a soundness and completeness result

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Systems, Man and Cybernetics, IEEE Transactions on  (Volume:24 ,  Issue: 11 )