Example 6.68 Nested Regions
<region:define id='BANNER' template='twoColumns.jsp'>
    <region:put section='logo' content='logo.jsp'/>

    <region:put section='advertisement' content='advertisement.jsp'/>
</region:define>
...
<region:define id="PORTAL" template='portal.jsp'>
    <region:put section='banner' content='BANNER'/>
  ...
    <region:put section='footer' content='footer.jsp'/>
</region:render>
