In jbossws we have a unified meta data model that is a subset of the AS meta data model. Together with that we have adapters from the AS model to the unified model. The adapters take care of the differences between AS versions. We also have different deployers for xml based/annotation based meta data. IMHO, its not a good idea to map xml onto annotations only to be able to use the same annotation deployer (if I understand correctly) I believe the EJB3 project should decide on it's meta data model and use container specific components that populate that meta data model. The model should be expressed in schema, which can then be reused in the context of AS schemas View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4056447#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...