<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<window
  id="test-window"
  title="Things"
  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

 <tree id="treeset" seltype="multiple" flex="1">

  <treecols>
    <treecol id="name" label="Things" primary="true" flex="1"/>
  </treecols>

  <treechildren>
   <treeitem item="most" container="true" open="true">
     <treerow>
       <treecell label="My Most Favourite Things"/>
     </treerow>
     <treechildren> 
       <treeitem id="m1">
         <treerow>
           <treecell label="Raindrops on roses"/>
         </treerow>
       </treeitem>
       <treeitem id="m2">
         <treerow>
           <treecell label="Warm woolen mittens"/>
         </treerow>
       </treeitem>
       <treeitem id="m3">
         <treerow>
           <treecell label="Brown paper packages"/>
         </treerow>
       </treeitem>
     </treechildren>
   </treeitem>
   <treeitem item="least" container="true" open="true">
     <treerow>
       <treecell label="My Least Favourite Things"/>
     </treerow>
     <treechildren> 
       <treeitem id="l1">
         <treerow>
           <treecell label="Scratching forks on dishes"/>
         </treerow>
       </treeitem>
       <treeitem id="l2">
         <treerow>
           <treecell label="Broken down buses"/>
         </treerow>
       </treeitem>
       <treeitem id="l3">
         <treerow>
           <treecell label="Rotten old bananas"/>
         </treerow>
       </treeitem>
       <treeitem id="l4">
         <treerow>
           <treecell label="Mosquitoes in summer"/>
         </treerow>
       </treeitem>
     </treechildren>
   </treeitem>
   <treeitem item="noopinion" container="true" open="true">
     <treerow>
       <treecell label="Things I Really Have No Opinion Of"/>
     </treerow>
     <treechildren> 
       <treeitem id="n1">
         <treerow>
           <treecell label="Elvis memorabilia"/>
         </treerow>
       </treeitem>
       <treeitem id="n2">
         <treerow>
           <treecell label="Chimney sweepers"/>
         </treerow>
       </treeitem>
     </treechildren>
   </treeitem>

  </treechildren>
         
 </tree>

</window>

