[Bug 5416] clarify sml ref constraint info and table 4-2 contents

http://www.w3.org/Bugs/Public/show_bug.cgi?id=5416





------- Comment #2 from kirk.wilson@ca.com  2008-01-26 20:01 -------
I agree with Jim.  For the sake of completeness the first row should remain;
otherwise the reader will have to think through the issues that we had to in
order to come to the obvious conclusion.

We might think about adding a note in order to prevent the discussion that we
had at the F2F--perhaps something like the following:

Note that if the element declaration *E* is not an SML reference, then the
validity rules are considered trivially satisfied in that there is no element
that would invalidate the rules.

But even that runs the danger of saying "too much".  Despite our discussion at
the F2F, I now think it the text fine as it now stands.