We have used the TREC Spanish Corpora, produced by the Linguistic Data Consortium
our experiments. Particularly, one corpus of the TREC-5 collection which consists of 50
topics (queries) and 57,868 documents in Spanish language from the ``El Norte'' mexican newspaper was
selected. The average size of vocabulary of each document
is 191.94 terms. Each of the topics has associated its set of
relevant documents. On average, the number of relevant documents
per topic is 139.36. The documents, queries and relevance
judgements (qrels) used in the experiments were all taken from TREC-5.