An Intuitive Interpretation of the Theory of Evidence in the Context of Bibliographical Indexing
35 Pages Posted: 23 Oct 2008
Date Written: April 1992
Models of bibliographical Indexing concern the construction of effective keywordtaxonomies and the representation of relevance between document s andkeywords. The theory of evidence concerns the elicitation and manipulation ofdegrees of belief rendered by multiple sources of evidence to a common set ofpropositions. The paper presents a formal framework in which adaptive taxonomiesand probabilistic indexing are induced dynamically by the relevanceopinions of the library's patrons. Different measures of relevance and mechanismsfor combining them are presented and shown to be isomorphic to thebelief functions and combination rules of the theory of evidence. The paperthus has two objectives: (i) to treat formally slippery concepts like probabilisticindexing and average relevance, and (ii) to provide an intuitive justificationto the Dempster Shafer theory of evidence, using bibliographical indexing as acanonical example.
Keywords: Probabilistic indexing, measures of relevance, Dempster Shafer theory of evidence, evidential reasoning
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