We describe the objectives and organization of the CLEF 2007 Ad Hoc track and discuss the main characteristics of the tasks offered to test monolingual and cross-language textual document retrieval systems. The track was divided into two streams. The main stream offered mono- and bilingual tasks on target collections for central European languages (Bulgarian, Czech and Hungarian). Similarly to last year, a bilingual task that encouraged system testing with non-European languages against English documents was also offered; this year, particular attention was given to Indian languages. The second stream, designed for more experienced participants, offered mono- and bilingual "robust" tasks with the objective of privileging experiments which achieve good stable performance over all queries rather than high average performance. These experiments re-used CLEF test collections from previous years in three languages (English, French, and Portuguese). The performance achieved for each task is presented and discussed. © 2008 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Di Nunzio, G. M., Ferro, N., Mandl, T., & Peters, C. (2008). CLEF 2007: Ad Hoc track overview. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 5152 LNCS, pp. 13–32). Springer Verlag. https://doi.org/10.1007/978-3-540-85760-0_2
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