>dimensional-values</var></nobr> options
of the class and its superclasses.  When more than one dimension-value
specification is supplied for a given dimension, the one supplied by the
most specific class is used.
</p>
<p>The effective <nobr><var>initial-space-instances</var></nobr> value for a
<a href="ref-glossary.html#id254">unit&nbsp;class</a> is the value specified in the definition of the most
specific <a href="ref-glossary.html#id254">unit&nbsp;class</a>. (No additive inheritance of
<nobr><var>initia