Rick Hightower wrote a couple good articles on Facelets, and the second gives a good example on using functions. I found it helpful. He goes for the programmatic approach of defining a facelets tag library; some people prefer defining their library in xml. I like the programmatic approach better; it seems create less duplication. http://www.ibm.com/developerworks/java/library/j-facelets2.html As far as creating some kind of annotation-driven framework for conditional rendering, I'm sure you could do it. Instead of using el functions, I'd guess you would be better off creating a component that marks its children rendered or not rendered, depending on their value-bindings. You could get some direction on how to do this by looking at Seam's components for model validation (ModelValidator and UIValidateAll, as well as Hibernate Validator code). But who knows; maybe that'd be harder to do. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4075579#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...