One additional point: Is there time to discuss maybe about jPDL 4? There I remembered Tom's idea to somehow specifiy input variables in start-states or states, so interfaces to call back a process can be "automatically" exposed (like the Web-Service receive in BPEL), this would be interessting... But maybe this is a sub-topic of variable management in jPDL at all... View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4181634#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...