RE: [xml-dev] Extract A Subset of a W3C XML Schema?

["Paul Brown" <prb@fivesight.com>]

> [Claude Bullard]
> It's tough to tell designers that XML only really cares 
> about well-formedness and then get them to buy into a 
> system based on validity.  It's like giving them free 
> popsicles without sticks.

Or, put another way, XML only solves the problem of inlining metadata,
not providing semantic and structural consistency to that metadata.

Most people meet semantic and stuctural incompatibility in XML documents
only later in their life as XML users, which is unfortunate, and it's
hard for people to imagine the difference between XML representations of
a single tangible, concrete object in the real world.  Incompatibilities
in representation and semantics are also where cost (for disputes, for
integration, etc.) enter the picture, making it doubly unfortunate.
(Because it spawns things like:
http://www.optimizemag.com/mckinsey/2003/0721.html)

One approach that looks interesting is the UDEF:

	http://www.udef.org

Which at least attempts to provide some equivalence between ns1:tomato
and ns2:tomatoe...

	-- PB