&quot;sguilhen(a)redhat.com&quot; wrote : One of the details I have to address has to do with schema validation. Is there any way to express a <xsd:choice> using the annotations? I'm asking because security policies should either have an authentication or an <authentication-jaspi> element, but never both simultaneously. How do I express this kind of restriction? I see a bunch of xsd:choice usage here: - http://anonsvn.jboss.org/repos/jbossas/projects/microcontainer/trunk/kern... but I don't think we do any special treatment / annotations in the code. You can do this programmatically, as we do it in certain places: - http://anonsvn.jboss.org/repos/jbossas/projects/microcontainer/trunk/kern... see initialVisit method. You can put this just before you create your security bean metadata. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4149180#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...