Challenges in Information Retrieval and Language Modeling Report of a Workshop held at the Center for Intelligent Information Retrieval, University of Massachusetts Amherst, September 2002 James Allan (editor), Jay Aslam, Nicholas Belkin, Chris Buckley, Jarnie Callan, Bruce Croft (editor), Sue Dumais, Norbert Fuhr, Donna Harman, David J. Harper, Djoerd Hiemstra, Thomas Hofmann, Eduard Hovy, Wessel Kraaij, John Lafferty, Victor Lavrenko, David Lewis, Liz Liddy, R. Manmatha, Andrew McCallum, Jay Ponte, John Prager, Dragomir Radev, Philip Resnik, Stephen Robertson, Roni Rosenfeld, Salim Roukos, Mark Sanderson, Rich Schwartz, Amit Singhal, Alan Smeaton, Howard Turtle, Ellen Voorhees, Ralph Weischedel, Jinxi Xu, ChengXiang Zhai Summary Information retrieval (IR) research has reached a point where it is appropriate to assess progress and to define a research agenda for the next five to ten years. This report summarizes a discussion o f IR research challenges that took place at a recent workshop. The attendees o f the workshop considered information retrieval research in a range o f areas chosen to give broad coverage o f topic areas that engage information retrieval researchers. Those areas are retrieval models, cross-lingual retrieval Web search, user modeling, filtering, topic detection and tracking, classification, summarization, question answering, metasearch, distributed
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