Arnaud,

I think there is a small term confusion: graph representation != graphical representation. Graphs are mathematical structures. Structured activities in BPEL (sequence, if, while, flow, pick, etc.) are "unfolded" by the jBPM BPEL parser into nodes, transitions and links. Graphs have a graphical representation, but the math concept is a separate thing.

My apologies if I am saying something you already knew.

Regarding the Eclipse designer, as a matter of fact, we are in touch with the developers behind that initiative and are working on an implementation of their runtime framework for jBPM BPEL. That might take a while as the runtime framework is not even there, but, as you say, this is a question of time.

I will link to it from the documentation so that our fine users are aware there is an open source designer on the works.

Thanks for your suggestions.