Thanks for explaining that. The transformation part is a strong point for xhtml and so is the standard conformance.
Different angle (not connected to the above) In terms of editing I think we should encourage people to use a semantic markup language (such as docbook) as a source format for all the reasons that Peter Hargreaves pointed out since all longer living documents (and their authors will) will, in the long run, benefit from such an approach. Mind you, even discussions on this mailing list would benefit from semantic markup when I think of applying a search engine to the archives. -- Ferdinand Soethe
