>Note: the text of this section is identical for all <code>oce</code> subclasses, and so
some of what you read here may not be relevant to the class being described
in this help page.</p>
<p>If the specialized method produces no matches, the following generalized
method is applied. As with the specialized method, the procedure hinges first
on the values of <code>i</code> and, optionally, <code>j</code>. The work proceeds in steps, by
testing a sequence of possible conditions in sequence.</p><ol><li><p>A che