Re: C.6 multiple declarations of same element?

> >C.6 Should XML retain SGML's prohibition on multiple declarations for
> >the same element (11.2.1)?
> Yes. XML DTDs should be really, really simple. 

I'm not sure that any significant complexity is added, especially since the
only content model allowed is a repeatable or group (right?).

A second declaration merrely adds to the or-group.

If my understanding on this is right, by the way, then the
non-determinisitic content models have already become a non-issue.
You can't have ambiguity in a model of the form