My english isn´´t good, but i try speak with you.
Do you know if i can integrate RCP/RAP with XML UI?
Where can i get you demo source sample?
I was looking your blog.It´´Is very interesting.
I will like see runing the demo but in RAP target
I am afraid that the Rich Ajax Platform / Rich Client Platform still require more Java programming than XML specification. I wouldn't be surprised if that would change though. For example, the Eclipse Modeling Framework and the Graphical Modeling Framework can be used to create models from XML Schemas. A powerful application based on EMF/GMF is the SOA Tools BPMN Modeler. (Actually I think this still uses objects in the background, but it is nice anyway ;-))
If you want to create rich AJAX UIs using XML technology, for now, Orbeon is a nice choice. But I can imagine it would be nice to see something similar based on Eclipse technologies, like OSGi. And something that works on both the client and the server side like RAP and RCP. (By the way, XForms do work both on the client and the server side if you have the right plugins... (edit))
The demo I created uses the Jython scripting language to avoid Java development. The Eclipse version on which it was based is a bit outdated now. But you can find it over here.
Sorry I cannot be of any help. Good luck with your efforts on RAP and RCP!