Creating multiple forms inside a Xform document and traveling between them sequentially and conditionally.

I'm trying to create a form builder that is based on XForms 2.0 standards. I need to support the feature of creating multiple forms/surveys and connecting them. Allowing the end user developer to control the flow of the travel... Both sequentially and conditionally. Conditionally meaning to make the survey/forms (Some form would not be shown to the user depending on the user input) I'm struggling to find a logical solution to use while creating the XForm 2.0 model. Anyone have some ideas i can use or anything i missed ?