multi-page forms?

Hello,
Newbie here... and the sf archives are down.

Suppose that I have a very large xml form model (e.g. US Tax Return 1040)
that I would like to have spanned across several different "forms"

One could use xforms:switch to enable/disable the different sections of
the tax return.

However, there is a lot of "rules" that come into play here, for example,
only show this section if all the following conditions are met.

*Income over 50k
*More than 3 dependents
*But did not claim xyz credit

I am thinking that perhaps a rule engine should be used to decide whether
to enable/disable the section.

so 2 questions:
1)  is a switch the best way to enable/disable display sections
2)




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