rder="0" alt="GoTo Top" src="top.png"/></a></td></tr></table>

<p><table class="tight" width="100%">
<tr valign="top"><td valign="baseline" align="left"%>
<nobr><b><font color="#000000">allowed-unit-classes-of</font></b></nobr></td><td valign="baseline"> &nbsp; </td><td valign="baseline" align="left" width="99%"><var>space-instance</var>
<nobr><span 
    style="font-family: serif; font-style: normal">=&gt;</span> <var>extended-unit-classes-specification-list</var></nobr></td><td valign="baseline" align="rig