> The wording "public domain" is not a legal one, and is not even a well
> defined term.
I think you will find that it is defined in some jurisdictions, but that
is by the way.

> But it's clear that no *ML can currently do the job of math typesetting in
> either paper or WWW media.

That is not clear at all. We are dicussing (mainly) author markup. Once
can clearly get tex quality (not least, by using tex) out of a document
that is marked up in XML. It is true, that especially for mathematics,
there is not (yet?) a realistic authoring environment that produces
mathematics marked up to an XML dtd. That is a big problem, but it is a
separate problem.

David