In this paper describe Berkeley’s approach to the Domain Specific (DS) track for CLEF 2006. This year we did not use the tools for thesaurus-based query expansion and de-compounding for German used in previous years. This year Berkeley submitted 12 runs, including one for each subtask of the DS track. These include 3 Monolingual runs for English, German, and Russian, 7 Bilingual runs (3 X2EN, 1 X2DE, and 3 X2RU), and 2 Multilingual runs. For many DS sub-tasks our runs were the best performing runs, but sadly they were also the only runs for a number of sub-tasks. In the sub-tasks where there were other entries, our relative performance was above the mean performance in 2 sub-tasks and just below the mean in another.


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  1. 1.
    Petras, V., Gey, F., Larson, R.: Domain-specific CLIR of English, German and Russian using fusion and subject metadata for query expansion. In: Peters, C., Gey, F.C., Gonzalo, J., Müller, H., Jones, G.J.F., Kluck, M., Magnini, B., de Rijke, M., Giampiccolo, D. (eds.) CLEF 2005. LNCS, vol. 4022, pp. 226–237. Springer, Heidelberg (2006)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2007

Authors and Affiliations

  • Ray R. Larson
    • 1
  1. 1.School of Information, University of California, BerkeleyUSA

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