The rapid growth in information science and technology in general and the complexity and volume of data in particular have introduced new challenges for the research community. Databases are growing incessantly and, in many cases, we need to extract some sort of knowledge from this continuous stream of data. The goal of this workshop is to convene researchers who deal with decision rules, decision trees, association rules, clustering, filtering, preprocessing, post processing, feature selection, visualization techniques, etc. from data streams and related themes.