notation"><code>XmlRegistry</code></a>, is mapped.
 <p>
 If <code>susbtitutionHeadName()</code> is not "" and the value is
 not "##default", then the value is the namespace name.</div>
<dl>
<dt><span class="seeLabel">See Also:</span></dt>
<dd><a href="#substitutionHeadName()"><code>substitutionHeadName()</code></a></dd>
</dl>
<dl>
<dt>Default:</dt>
<dd>"##default"</dd>
</dl>
</li>
</ul>
</li>
</ul>
</section>
<section role="region">
<ul class="blockList">
<li class="blockList"><a id="substitutionHeadName()"