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00925njm 22002777a 4500 dc Zazo Rodríguez, Ángel Francisco author García de Figuerola Paniagua, Luis Carlos author Alonso Berrocal, José Luis author Rodríguez Vázquez de Aldana, Emilio author 2002 The objective of our participation this year in the Spanish monolingual task at CLEF2002 is to continue the study in term expansion. Last year we showed results in stemming. Now, our effort is centered in term expansion using thesauri. Many words that derive from the same stem have a close semantic content. However other words with very different stem origin have near semantic sense. In this case, the analysis of the word relationships in document collection can be used to construct a thesaurus of related terms. After, the thesaurus is used to expand a term with the best related terms. Zazo Rodríguez, A.F., García Figuerola, L.C., Alonso Berrocal, J.L. y Rodríguez Vázquez de Aldana, E. (2002). Term expansion using stemming and thesauri in Spanish. En C. Peters et al. (Eds.), "Results of the CLEF 2002 Cross-Language System Evaluation Campaign. Working Notes for the CLEF 2002 Workshop 19-20 September, Rome, Italy", pp. 177-183. http://hdl.handle.net/10366/56154 http://hdl.handle.net/10366/56154 Recuperación de la información Thesaurus Information retrieval Term expansion using stemming and thesauri in Spanish