Charles University at CLEF 2007 Ad-Hoc Track

In this paper we describe retrieval experiments performed at Charles University in Prague for participation in the CLEF 2007 Ad-Hoc track. We focused on the Czech monolingual task and used the LEMUR toolkit as the retrieval system. Our results demonstrate that for Czech as a highly inflectional language, lemmatization significantly improves retrieval results and manually created queries are only slightly better than queries automatically generated from topic specifications. Categories and Subject Descriptors H.3 [Information Storage and Retrieval]: H.3.1 Content Analysis and Indexing; H.3.3 Information Search and Retrieval; H.3.4 Systems and Software; H.3.7 Digital Libraries General Terms Measurement, Performance, Experimentation Keywords Ad-Hoc Retrieval

• Type: Conference
• Year: 2007
• Where: CLEF
• Authors: Pavel Ceska, Pavel Pecina
• Keywords: CLEF 2007, Clef 2007 Ad-hoc, Information Retrieval, Keywords Ad-Hoc Retrieval, Retrieval System