A new "Meet the Engineer" Q&A I did with a java.net blogger appears on java.sun.com here if you want to check it out:
(http://java.sun.com/developer/Meet-Eng/kawaguchi/)
I interviewed Kohsuke Kawaguchi, who has worked with XML schema languages since 2001, including specification work on RELAX NG
and W3C XML Schema, and implementation work in a number of related Java artifacts, including JAXB...
