>
> I'd like to assert that the element set either contains a simple
> type or more set elements.
>
>
> I can't figure out how to make a union of the two. I'm beginning
> to think that this is non-deterministric, or in some other
> way a bad design.
>
It's entirely deterministic, in the sense that there are simple finite state
machines that could validate your document against this constraint. The only
thing that makes it a bad design is that XML Schema can't describe it.
Michael Kay
http://www.saxonica.com/
