Valid or Invalid??

[shachi]

Can anyone tell me if this is valid HTML ??

<web:binding selector="#msve_ScopingBar_container" type="Search.ScopeDock">
    <web:defaults>
	    <web:param name="scope" value="local"></web:param>

	    <web:param name="queryboxid" value="what"></web:param>
	    <web:param name="mode" value="0"></web:param>
	    <web:param name="onLoadedCallback" value="VE_ScopingBar_onLoadCallback"></web:param>
    </web:defaults>
    <web:references priority="High">
        <web:add src="http://search.live.com/search/searchbox.js?v=3" type="script"></web:add>
        <web:add src="http://search.live.com/search/search.css?v=3" type="css"></web:add>
        <web:add src="http://search.live.com/search/search.js?v=3" type="script"></web:add>
        <web:add src="http://search.live.com/search/globals.js?v=3" type="script"></web:add>

        <web:add src="http://search.live.com/search/scopes.js?v=3" type="script"></web:add> 
        <web:add src="http://search.live.com/search/strings.js?v=3&mkt=en-us&setlang=en-us" type="script"></web:add> 
		<web:add src="http://search.live.com/live/macro.aspx?v=3&op=installed_js" type="script"></web:add>                
    </web:references>
</web:binding>

Src: local.live.com/, virtualearth.com

[Twey]

It's not HTML, full stop
It looks to be valid XML, at a glance.

[shachi]

It's not XML. I found it on the source of the index page (http://www.local.live.com/) when I was researching on the Javascript post about mouse wheels. Twey: Didn't you tell me that our custom tags are not valid in HTML ?? Then how come microsoft use it??
Or is it also patented??

[Twey]

Well I can't see it on there...
I do see some references to VML, however, which is a form of XML that can be embedded into HTML pages.

Twey: Didn't you tell me that our custom tags are not valid in HTML ?? Then how come microsoft use it??

In this, at least, Microsoft aren't hypocritical: their pages very rarely validate. I think microsoft.com does now, but it was only a few months ago that they updated it.