Robert van Loenhout wrote:
> When I write my own DTD I am not allowed to write comments with -- 
> comment --
> yet W3C uses it everywhere.

Do you write XML DTDs? IIRC it's not allowed for XML DTDs, but for SGML 
DTDs. HTML 4.01 is based on SGML. So it's ok.
-- 
Johannes Koch
In te domine speravi; non confundar in aeternum.
                             (Te Deum, 4th cent.)