Hi Sebastian. In my experience, XPDL is not really very important today. It is a standard, yes, but not very well known in industrie (among decision makers at least). The WfMC simply did a bad job in merketing... One of its key features is extensability, but this leads to processes, having 80 % of its stuff in extensions. What value does such a standard have? And BPMN 2.0 clearly target process execution as well, so I expect it to become the much more interesting option. But it is not here yet, so no option to use today. And if you don't go for BPEL (which may be a good choice in some projects, in a lot of projects not), jPDL is a very good choice as well in my opinion. In the area of OSS it is more mature as XPDL engines. Okay, Bonita is vetry interessting as well, true, and at least they base on the PVM as well (but unfortunately an old version, hopefully they migrate to the latest one) but I think community and support is better at jBPM (If you read it: Sorry Miguel ;-))... My two cents... Cheers Bernd View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4243103#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...