RE: Versioning of XML Schema and namespaces

> What should
> an XML document instance that tells you what XSD to validate 
> it against look like? 

In my view, it should look something like this:

<?xml version="1.0"?>
<xsl:transform xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
               version="2.0">

The namespace tells you what standard vocabulary the document uses, and the
version attribute tells you what version of that standard is used.

The job of finding a suitable schema (or other tool) to verify that the
document does indeed conform to that standard is left entirely to the
recipient.

As has been said a number of times on this thread, the recipient is
validating the document because he doesn't trust the sender. So it makes no
sense at all to validate against a schema nominated by the sender.

Michael Kay
http://www.saxonica.com/