Hi, Basically in Drools you have packages that can contain any number of rules. Then you can build knowledge bases that can contain any number of packages. With that you create sessions to interact with that rules. Then you need to remember that unless you use agenda-groups, ruleflow-groups or activation-groups all the rules will be evaluated. Depending on your scenario is how your sessions(stateless or statefuls) needs to be created as well as how to segment the rules in your packages. Hope it helps! Greetings 2009/12/15 tim arnold <stageonemedia(a)yahoo.com&gt; -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -