> 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