<zk>
	<zscript><![CDATA[
		import org.zkoss.zul.*;

		
		TreeModel model = new DefaultTreeModel(
				new DefaultTreeNode(null, new DefaultTreeNode[] {
		      		new DefaultTreeNode("item 0"),
		          	new DefaultTreeNode("item 1"),
		          	new DefaultTreeNode("item 2")
				})
			);
		
		
		TreeitemRenderer renderer = new TreeitemRenderer() {
		    public void render(Treeitem item, Object data) throws Exception {
		    	TreeNode node = (TreeNode) data;
		        item.setLabel(node.getData().toString());
		    }
		};
	]]></zscript>
	<tree width="300px" itemRenderer="${renderer}" model="${model}">
		<custom-attributes org.zkoss.zul.tree.autoSort="true"/>
		<treecols>
			<treecol  label="col" sort="auto"  sortDirection="ascending" />
		</treecols>
	</tree>
</zk>