span>&nbsp;&nbsp;&nbsp;<code>:gbbopen-core</code>
</p>
<p><span class="fndoclabel">Arguments and values</span><table class="tighttop">
<tr valign="top"><td valign="baseline" nowrap><i>space-instance</i></td><td valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign="baseline"> A <a href="ref-glossary.html#id222">space&nbsp;instance</a>
</td></tr><tr valign="top"><td valign="baseline" nowrap><i>extended-unit-classes-specification-list</i></td><td valign="baseline">&nbsp;&nbsp;&nbsp;&nbsp;</td><td valign="