es an identifier &lt;condition-type&gt; to some value describing
the condition type. &lt;supertype&gt; must be the name of a previously
defined condition type. </p>
<p><code>Define-condition-type</code> also defines &lt;predicate&gt; to
a predicate that identifies conditions associated with that type, or
with any of its subtypes.</p>
<p>Each &lt;field-spec&gt; must be of the form <code>(</code>
&lt;field&gt; &lt;accessor&gt;<code>)</code>
 where both &lt;field&gt; and &lt;accessor&gt; must be identifiers. <