correct and String blob can also be a List, Map, Document, whatever.... see the unittests for all kinds of examples View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4133216#4133216 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4133216