Is there a library or framework for serializing a hierarchy of Ruby
object to and from XML format?

I'm looking for something that gives alot of control over the XML format 
( such as Quick for Java: http://jxquick.sourceforge.net/ by Bill la
Forge )
and not something cast in iron, like SOAP, nor language-tied, like
KOALA.

If there isn't one, I just might be mad enough to do a stab at making a
quick-n-dirty "rxquick"-alike thingie. 
But then I do already have XML serialization seeping from both ears from
working on it C++...

-- 
<[ Kent Dahl ]>================<[ http://www.stud.ntnu.no/~kentda/ ]>
  )____(stud.techn.;ind..data)||(softwareDeveloper.at(Trustix))_( 
 /"Opinions expressed are mine and not those of my Employer,      "\
( "the University, my girlfriend, stray cats, banana fruitflies,  " )
 \"nor the frontal lobe of my left cerebral hemisphere.           "/