association of RELAX NG with a document

I'm a relatively new "convert" (from XML Schema) to RELAX NG. I
understand that there is no standard way to associate a RELAX NG schema
with a document. I'm just wondering if there is any plan to make this
possible.

Tsuguya Sasaki, PhD
http://www.ts-cyberia.net/
http://www.jewish-languages.org/