A tabpanel is the body of a single tab panel. You would place the content for a group of components within a tab panel. The first tabpanel corresponds to the first tab, the second tabpanel corresponds to the second tab and so on.

<zk>
<tabbox width="400px">
    <tabs>    
        <tab label="Tab 1"/>        
        <tab label="Tab 2"/>        
    </tabs>    
    <tabpanels>    
        <tabpanel>This is panel 1</tabpanel>        
        <tabpanel>This is panel 2</tabpanel>        
    </tabpanels>    
</tabbox>
<space/>
<tabbox width="400px" mold="accordion">
    <tabs>    
        <tab label="Tab 3"/>        
        <tab label="Tab 4"/>        
    </tabs>    
    <tabpanels>    
        <tabpanel>This is panel 3</tabpanel>        
        <tabpanel>This is panel 4</tabpanel>        
    </tabpanels>    
</tabbox>
</zk>