<A target="_blank" href="http://www.dominoguru.com/pages/xzibit_nested_viewpanel_xpages.html">Chris Toohey says, if you've been programming in Notes/Domino for very long</A>, you're probably accustomed to using "threaded rows". But, if you're moving to XPages, you may want to re-think things. He's included an XPages demo program on "Views in Views".