What's in a Link? From Document Importance to Topical Relevance

Authors:
Marijn Koolen;Jaap Kamps
Affiliations:
Archives and Information Studies, University of Amsterdam, The Netherlands;Archives and Information Studies, University of Amsterdam, The Netherlands and ISLA, University of Amsterdam, The Netherlands
Venue:
ICTIR '09 Proceedings of the 2nd International Conference on Theory of Information Retrieval: Advances in Information Retrieval Theory
Year:
2009

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Abstract

Web information retrieval is best known for its use of the Web's link structure as a source of evidence. Global link evidence is by nature query-independent, and is therefore no direct indicator of the topical relevance of a document for a given search request. As a result, link information is usually considered to be useful to identify the `importance' of documents. Local link evidence, in contrast, is query-dependent and could in principle be related to the topical relevance. We analyse the link evidence in Wikipedia using a large set of ad hoc retrieval topics and relevance judgements to investigate the relation between link evidence and topical relevance.