Is presentation layer part of Business Process design?

[sivapr]

I have a workflow kind of web application where user has to submit four screens of data(with data persistence on each screen) in sequential order. I have been trying to implement this using JBPM.
Here is a question regarding that
When I model the business process , should the presentation layer JSP/Struts action should it be tied to a task/node.
or
The process should be just at the data level and let the strust action call the JBPM context?manager like the Struts Tasks example shown in the wiki
Thanks,
Siva

[kukeltje]

what is the difference? Tying the presentation layer to the tasknode is done via the jbpmcontext