Please, take a look at these threads. Might be this functionalitycould be done (or belongs) to RichFaces as opposed to Seamhttp://www.jboss.com/index.html?module=bb&op=viewtopic&t=116549http://www.jboss.com/index.html?module=bb&op=viewtopic&t=116230&start=10http://www.jboss.com/index.html?module=bb&op=viewtopic&t=116149http://www.jboss.com/index.html?module=bb&op=viewtopic&t=114328http://andrewfacelets.blogspot.com/2006/06/creating-composite-controls-with-jsf.htmlThanks