difference between java page flow and java process definition

[ylogic]

I joined a BEA WebLogic Integration project as an entry level BEA developer. I have a big question on the real difference between a jpf and a jpd. My co-workers say there is actually no difference, but I don't believe so. I think a jpd is more like a back-end process and it may or may not not need a View(MVC). While a jpf is the Controller(MVC) and is closely related to a web-based application where all the navigation logic(and only navigation logic) resides. A jpf normally should have a View(rendered on browser or other terminals) to present data from Model. I strongly believe this is true. But my project manager and my team lead, both are very technical guys, fiercely object to my understanding. I am extremely curious to have input from the BEA community on this fundamental concept.