Possible improvement to XSD validation service

Hi,

First off, thanks for providing the XSD validation service:

	http://www.w3.org/2001/03/webdata/xsv

It's a very useful resource.

I've a suggestion for a possible improvement.  I've an XSD that includes XHTML 
in the annotation-documentation elements.  To do this, I've included the XHTML 
namespace; however, the validator doesn't like this and emits the following 
error message:

> Attempt to load a schema document from
> http://www.w3.org/1999/xhtml
>  (source: new namespace) for
>    http://www.w3.org/1999/xhtml,
>     failed:
> 
> Not recognised as W3C XML Schema or RDDL: html

I think what I'm doing is OK; here's an example fragment, where the schema 
element has the namespace declaration 
xmlns:xhtml="http://www.w3.org/1999/xhtml"

    <complexType name="example_t">
        <annotation>
            <documentation source="http://www.example.org/ref.pdf#page=11"
                           xml:lang="en">
                <xhtml:div>
                    <xhtml:p>
                        An abstracted, logical view of software and [...]
                    </xhtml:p>
                </xhtml:div>
            </documentation>
        </annotation>
	<!-- Rest of defn goes here -->
    </complexType>

If this is OK, would it be possible to adjust the validator so that it knows 
about the xhtml namespace?

Cheers,

Paul.