"hubaghdadi" wrote : So, in order to use Trinidad, my application has to use a JSF implementation (like Sun RI or Apache MyFaces)? Yes. anonymous wrote : And if it is the case, it is impossible to deploy Trinidad & MyFaces on JEE5 AS according to JEE5 restriction... Assuming you mean JBoss AS 5 by JEE5, then I think you can http://wiki.jboss.org/wiki/Wiki.jsp?page=JBoss5AndMyFaces but of course this would be untested/unsupported by JBoss. I suggest you ask about this on a JBoss AS forum. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4116342#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...