It's in the manual. http://docs.jboss.com/seam/2.0.0.CR1/reference/en/html_single/#validation (towards the end of the chapter) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4091173#4091173 Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&p=4091173