Edson Oliveira Altigran Soares da Silva Edleno Silva de Moura João M. B. Cavalcanti Extracting and Searching Useful Information Available on Web FAQs. 102-116 2006 conf/sbbd/2006 SBBD http://www.lbd.dcc.ufmg.br:8080/colecoes/sbbd/2006/008.pdf db/conf/sbbd/sbbd2006.html#OliveiraSMC06