[relaxng-user] missing start elementt

[David Tolpin]

> This is a general problem with RELAX NG: most of the language
> restrictions can't be captured by the RNG schema for RNG.

This one easily can, by the way. RNG is context specific, and specifying
that the 'grammar' element has different content models in different contexts
is possible.

On the other hand, if includeContent is different from grammarContent, then
topLevelContent can be different too. It is easy and natural in BNF, RNG
and plain text. I would be glad to see this part of the specification updated --
it would make my life easier.

David Tolpin