enabling/disabling assertions

Is there any way to enable/disable assertions in a 1.1 schema?

I want to use assertions, but only enforce them if a switch is set
(just like assertions in java) or perhaps ignore them if its a 1.0
processor.

Is that possible now, or something that's planned?


thanks
-- 
Andrew Welch
http://andrewjwelch.com
Kernow: http://kernowforsaxon.sf.net/