problem of polimorphism web service is post here: http://www.jboss.org/index.html?module=bb&op=viewtopic&t=163305 I have tried "jbossws-metro-3.2.1.GA.zip" in jboss510, polimorphism web service[@XMLSeeAlso] is supported well!!! The same example works in Glassfish too. There must be something wrong with "jbossws-native-3.2.1.GA.zip". There is no response here, i am discouraged. :( View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4265772#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...