Most likely one of the reasons why you did not get an answer is the kind of triviality of the question AND the fact that they are not part of the 'public api' and therefor it is not advised to use them. Short answer (from the API docs on the classes) | /** parses a descriptor for looking up an object from | * JNDI through the InitialContext. | */ | A little closer look on the package name shows it is a pvm class, and with some reading you can see that these kinds of classes are used to parse processdefinitions. So it most likely is used to have attributes on a certain node implementation to call e.g. a ejb method on an ejb instead of on a pojo. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4267123#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...