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Journals ACM SIGIR Forum Volume 31: Special Issue

Dempster-Shafer ™s Theory of Evidence applied to Structured Documents: modelling Uncertainty Mounia Lalmas Department of Computing Science University of Glasgow G128QQ Scotland mounia@dcs.gla. ac.uk Abstract Documents ojlen display a structure determined by the author, e.g., several chapters, each with several sub-chapters and so on. Taking into account the structure of a document allows the retrieval process to focus on those parts of the documents that are most relevant to an information need. Chiaramella et al advanced a model for indexing and retrieving structured documents. Their aim was to express the model within a framework based on formal logics with associated theories. They developed the logical formalism of the model. This paper adds to this model a theory of uncertainty, the Dempster-Shafer theory of evidence. It is shown that the theory provides a rule, the Dempster ™s combination rule, that a[lows the expression of the uncertainty with respect to parts of a document, and that is compatible with the iogica{ model developed by Chiaramella et al. model within a framework based (i) on formal Iogics to capture .. the semantics of information and (ii) with associated theories of uncertainty capable of handling uncertainty inherent in the IR process and

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Dempster-Shafer's theory of evidence applied to structured documents: modelling uncertainty

Lalmas, Mounia
ACM SIGIR Forum , Volume 31 (SI)
Association for Computing Machinery – Dec 2, 1997

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