Revision Rules in the Theory of Evidence

Abstract--Combination rules proposed so far in the DempsterShafer theory of evidence, especially Dempster rule, rely on a basic assumption, that is, pieces of evidence being combined are considered to be on a par, i.e. play the same role. When a source of evidence is less reliable than another, it is possible to discount it and then a symmetric combination operation is still used. In the case of revision, the idea is to let prior knowledge of an agent be altered by some input information. The change problem is thus intrinsically asymmetric. Assuming the input information is reliable, it should be retained whilst the prior information should be changed minimally to that effect. Although belief revision is already an important subfield of artificial intelligence, so far, it has been little addressed in evidence theory. In this paper, we define the notion of revision for the theory of evidence and propose several different revision rules, called the inner and outer revisions, and a modifi...

• Type: Journal
• Year: 2010
• Where: ICTAI
• Authors: Jianbing Ma, Weiru Liu, Didier Dubois, Henri Prade
• Keywords: Artificial Intelligence, ICTAI 2010, Input Information, Outer Revision, Revision Rules