I don't think Tom disagrees with you (and he might not have reread the whole thread, otherwise I think he would have made a different statement). The thing is, is that the target of the *current* release of jBPM 4 was 'normal users' and not to support multiple models. That is intended for 4.1/4.2 so the 'not programming against interfaces' currently is not a real problem. For you it is, and your remarks are valid (I think Tom agrees on that). The only thing I disagree with is your remark about it being released to soon. Nobody expected that someone would pick this part up that quickly. :-) The easiest thing you can do is make patches, attach them to a jira issue and they will get fixed some time it the future. The best you can after that is flooding this list with requests about reviewing your patches and in the meantime fill in the contributors agreement. If both 'succeed' you can make the patches yourself and discuss on this list the directions of your other repository solution. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4244751#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...