XML Catalog support for .Net (and others)

Anyone know if any support for OASIS XML catalogs is built in to or 
available as a third party add-on for MSXML? I can't find any. I'm 
writing about catalogs right now, and I'd like to be able to either 
point to a definite location or say there isn't such a thing.

My research indicates that Xerces-C++ and Xalan-C++ do not support catalogs.

Ant seems to have invented its own catalog syntax rather than using the 
OASIS standard.

JAXP-based tools can use Norm Walsh's Resolver classes now at the XML 
Commons Apache Project.

libxml/libxslt (and presumably tools derived from it) has solid catalog 
support built-in.

Have I missed anything else?


--
Elliotte Rusty Harold