[plt-scheme] xexprs, characters, and automatic transforms

Hi all,

Today I started playing around with the PLT web server for the first 
time (and let it eat up most of my day, I'm afraid...).  I hit one snag 
awhile ago:  how can I insert an entity reference in a string I'll be 
putting into an xexpr?

The server is escaping my text (e.g. "a b") for me, and from 
poking around I'm guessing it happens in xexpr->xml; is there an easy 
way to disable or circumvent this feature?  (Short of regexp silliness, 
of course...that'd make me feel like I'm back in the P*** world...)

jmj

--
Find out just what any people will quietly submit to, and you have the
exact measure of the injustice and wrong which will be imposed on them.
		-- Frederick Douglass