In the current stage of human development, the boom, assimilation and intensive use of knowledge has led to what we know as Knowledge Society, in which information management, documentation and knowledge are considered as vital strategic components. The horizons have been widened towards other jobs summoned to cooperate with information professionals: system designers, data providers, editors, salespersons, archivists, technicians, engineers and electronic text codification specialists, whose opinions and experiences make possible the localization, management, retrieval and use of digital information. New tools have been created to make easier the access to the great amount of knowledge generated daily. One of the most used is Text Mining, which allows the different organizations to explore a great number of texts that are not organized in data form, as well as to establish patterns and to extract useful knowledge
