Chapter

Comparative Evaluation of XML Information Retrieval Systems

Volume 4518 of the series Lecture Notes in Computer Science pp 57-63

CISR at INEX 2006

  • Wei LuAffiliated withCenter for Studies of Information Resources, School of Information Management, Wuhan University, China and City University
  • , Stephen RobertsonAffiliated withMicrosoft Research, CambridgeCentre for Interactive Systems Research, Department of Information Science, City University London
  • , Andrew MacfarlaneAffiliated withCentre for Interactive Systems Research, Department of Information Science, City University London

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Abstract

In this paper, we describe the Centre for Interactive Systems Research’s participation in the INEX 2006 adhoc track. Rather than using a field-weighted BM25 model in INEX 2005, we revert back to using the traditional BM25 weighting function. Our main research aims in this year are to investigate the effects of document filtering (by considering only the top-ranked documents), element filtering by length cut-off and the effect of using phrases. The initial results show the latter two methods did not do well, while the first one did well on FOCUSED TASK and RELEVANT IN CONTEXT TASK. Finally, we propose a novel method for BEST IN CONTEXT TASK, and present our initial results.