Hi Roland, I like to see that somebody is interested in principles as well. For all of you familiar with workflow but not with case handling read article is.tm.tue.nl/staff/wvdaalst/publications/p252.pdf It is far the best what I have found, worth reading till the end. It is written by professor Van der Aalst, the guy behind workflowpatterns.com. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4192186#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...