As long as the interfaces contain the complete signature and are not extended by the concrete implementation that should be no problem. Otherwise, this is a tools issue. When you go <java-wsdl> you must find a way to produce the correct abstract contract. i.e. the wsdl contained schema must contain definitions of all concrete types. AFAIK, there is no tool that can guess the transitve closure of an interface View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3986770#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...