<XML><RECORDS><RECORD><REFERENCE_TYPE>3</REFERENCE_TYPE><REFNUM>9022</REFNUM><AUTHORS><AUTHOR>Chang,Y-J.</AUTHOR><AUTHOR>Wang,J.</AUTHOR><AUTHOR>Lalmas,M.</AUTHOR></AUTHORS><YEAR>2008</YEAR><TITLE>Generation of query-biased concepts using content and structure for query reformulation</TITLE><PLACE_PUBLISHED>13th International Conference on Applications of Natural Language to Information Systems (NLDB2008), London</PLACE_PUBLISHED><PUBLISHER>LNCS, Springer</PUBLISHER><PAGES>136-141</PAGES><LABEL>Chang:2008:9022</LABEL><KEYWORDS><KEYWORD>query reformulation</KEYWORD></KEYWORDS<ABSTRACT>This paper proposes an approach for query reformulation based on the generation of appropriate query-biased concepts. Query-biased concepts are generated from retrieved documents using their content and structure. In this paper, we focus on three aspects of the concept generation; the selection of query-biased concepts from retrieved documents, the effect of the structure, and the number of retrieved documents used for generating the concepts.</ABSTRACT><NOTES>Short Paper</NOTES></RECORD></RECORDS></XML>