ht">[<i>Generic&nbsp;Function</i>]
</td></tr></table></p>
<p><span class="fndoclabel">Purpose</span> <br />Return the <a href="ref-glossary.html#id74">extended&nbsp;unit-classes&nbsp;specifications</a> of
<a href="ref-glossary.html#gl:unit-class">unit&nbsp;classes</a> whose <a href="ref-glossary.html#gl:instances">instances</a> are allowed on a
<a href="ref-glossary.html#id222">space&nbsp;instance</a>.
</p>
<p><span class="fndoclabel">Method signatures</span><table class="tightertop" width="100%">
<tr valig