Relax NG - increasing acceptance at W3C?

In the recent past there are hints that Relax NG is beginning to garner 
increasing acceptance in at least parts of W3C.

For example, the schema for the XHTML 2.0 WD 
(http://www.w3.org/TR/2003/WD-xhtml2-20030506/) uses Relax NG.

In addition the Chair of the SVG WG has indicated an interest in exploring 
Relax NG as a schema language to use with SVG 
(http://lists.w3.org/Archives/Public/www-svg/2003Apr/0096.html).

Are there any other signs of acceptance of Relax NG in W3C specifications?

It may not be totally coincidence that Relax NG seems to be eliciting most 
interest in the context of presentation-related technologies.

Andrew Watt