<XML>
<screen name="a">
 <button name="1" command="cmd1" title="button1"></button>
 <button name="2" command="cmd2" title="button2"></button>
</screen>
<screen name="b">
 <button name="1" command="cmd1" title="button1"></button>
 <button name="2" command="cmd2" title="button2"></button>
</screen>
</XML>

