XML-Frontend to Backend communication - how to model ?

[JohnDoe]

One question:
There are new UI approaches such as MXML, XAML, XUL, ZUL and others. The application backends are Service based (HTTP, Webservices, RPC).

What is the best way to describe the frontend/backend-communication ?
Do you suggest sequence diagrams or other diagram types ?

Best wishes
Bernd

[thomas.kilian]

Well. Definitely depends on what you're trying to say. For communication the name suggests Communication Diagrams. But if you focus on certain other aspects you might better be served with Sequence, State or Timing. So what do you want to model?