Thanks for your suggestions, norman! Apache JXPath is very extensible. I will try to create an extension for Seam ;) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4081089#4081089 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4081089