l-space-instances</var></nobr> is performed.) If no definitions
specify an <nobr><var>initial-space-instances</var></nobr> value, <code>nil</code> is used.
</p>
<p>The <nobr><var>instance-name-comparison-test</var></nobr> value is not inherited.  If
no value is specified in the <a href="ref-glossary.html#gl:unit-class">unit-class</a> definition, the default
initialization value associated with the metaclass is used.
</p>
<p>If a <var>retain</var> value is not specified, a value of
<nobr><code>:propagate</co