One problem with inclusion of something like a MetaMapper class in the ManagementProperty annotation is that its leaking server side types to the client since MetaMapper will reference the server side java class. If this is used by an attachment to map a non-simple deployment type to a CompostiteValue for example, this can't be marshaled to the client environment as thta type will not be available. I guess we need a transient Attachments notion where server specific information could be placed, and have a convention of looking for the MetaMapper.class attachment in the AbstractManagedObjectFactory. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4191498#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...