I'll only cover @EJB on class level, because method and field just add beanInterface and name to the mix. @EJB(name="ejb1", mappedName="refs/client/EJB1") Should create java:comp/env/ejb1 -> refs/client/EJB1. @EJB(name="ejb1") Is illegal. @EJB(name="ejb1", beanInterface=IFace1.class) Should first look in the current deployment unit for a bean implementing IFace1, then sibling deployments, then parent sibling deployments (who should look into child deployments) recursively. By spec this stops at JavaEE application level. @EJB(name="ejb1", beanName="Ejb2Bean") Should first look in the current deployment unit for a bean named "Ejb2Bean", then sibling deployments, then parent sibling deployments (who should look into child deployments) recursively. By spec this stops at JavaEE application level. @EJB(name="ejb1", beanName="../myjar.jar#Ejb3Bean") Looks in sibling deployment "myjar.jar" for a bean named "Ejb3Bean". By now the reference should be resolved and the bean.mappedName should be inserted in the ejb.mappedName. If not, loud warning or exception. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4147720#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...