Instance from Schema?

I know there are tools to create W3C XML Schemas from instance  
documents. Is there something that does the same thing the other way  
round, i.e. create a (sample) instance from a Schema? Preferably  
implemented e.g. in XSLT or in some Java lib?

Thanks,
Stefan

--
Stefan Tilkov, , http://www.innoq.com
innoQ Deutschland GmbH, Halskestr. 17, D-40880 Ratingen, Germany
Phone: +49 170 471 2624  Fax: +49 2102 77160-1
ICQ: 177869128, AIM: stefantilkov, Weblog: http://www.innoq.com/blog/st/