How to copy in-scope namespace bindings

[Martin Probst]

> specification explicitly doesn't say that a conforming implementation must
> reject any construct that isn't defined in (or "supported by") the spec: and
> as far as I have been able to determine, that is a deliberate omission. The
> cultural background of XQuery is in the database world, where vendors
> routinely expect to implement their own enhancements to standards and users
> typically don't complain.

That is a tough decision in my opinion. For example, the standard
mandates that "5div 3" must be treated as an error, at least that's
the way I read it. Our parser actually contains several special case
statements that check for such conditions - normally, we'd be able to
properly parse that (and I don't quite understand why it should be a
problem), but we need special logic to prevent that. The same thing
applies to casting strings to QNames at run time, and other similar
things. I'm actually thinking about implementing a more rigid
standards compliancy mode that enforces these things, and a more
lenient mode. Preventing things like the run time case to QName is
quite a pain for users, and it's entirely gratuitous in my opinion.

Regards,
Martin