=2D----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Michael Kay" writes:

> I'm struggling with this a bit in Saxon. I think the rule I have to adopt=
 is
> that once a schema component has been used for validating documents that
> exist in the current "environment" (that is, whose PSVIs I can reach),
> redefinition of that schema component is banned.

On an episode-by-episode basis, this makes sense to me, and I think is
covered at least in many cases by the "no new namespaces once we
start" provision.

But across multiple episodes, I don't think the spec. licenses this --
each episode should be treated completely independently.

So, the obvious question -- how can their be more than one document in
the "current 'environment'"?

ht
=2D -- 
 Henry S. Thompson, HCRC Language Technology Group, University of Edinburgh
                     Half-time member of W3C Team
    2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440
            Fax: (44) 131 650-4587, e-mail: ht@i...
                   URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged sp=
am]
=2D----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.6 (GNU/Linux)

iD8DBQFDAzUBkjnJixAXWBoRApgqAJ9uYPvEJ1r3IPGnOZYKWN9SfNPQ4ACfS0VO
owVVK4JzsG0SDgjvMbI9giI=
=rkX+
=2D----END PGP SIGNATURE-----

From mike@s... Wed Aug 17 13:48:25 2005
Received: from lisa.w3.org ([