Paul and Michael, There is perhaps no realistic alternative to LaTeX for writing mathematics today, but MathML is a language for the future and I like the visions and the goals associated with this language. I will not try to argue for MathML here because this is done in the specification (actually a draft) at http://www.w3.org/TR/1999/WD-MathML2-19991222. As discussed in Section 1.3.1 (Layered Design of Mathematical Web Services) MathML provides the lower level of a two layer architecture where LaTeX would be a language (tool) at the higher level (generating MathML code). There already exists several different tools for converting LaTeX to MathML so a straightforward solution would be to construct a converter also for some popular diagram specification language (package). Since MathML does not support the specification of complicated labelled diagrams the output would be a mixture of MathML and e.g. VML (or SVG) which are markup languages for vector graphics. This would also be in accordance with Section 7.1.5.2 of the MathML specification. So I suppose I have to reformulate my question from my first letter and ask whether there are any such tools or converters? I do not know much about the PDF format. When I publish a document written in LaTeX on the web I usually generate a postscript version and a PDF version (generated using Adobe distiller). Thanks for your replies. Lars L ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com