Information Retrieval Model

Our information retrieval is based on the Boolean Model, and, in order to rank documents retrieved, we used the Jaccard's similarity function, applied to both, the query and every document of the corpus used. Previously, each document was preprocessed and its index terms were selected (the preprocessing phase is described in section 3.1). For this purpose, several values of a neighbourhood of TP were used as thresholds, as equation 2 indicates.