ass="programlisting">void	xmlExpRef			(<a href="libxml-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> exp)<br />
</pre><p>Increase the <a href="libxml-SAX.html#reference">reference</a> count of the expression</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>exp</tt></i>:</span></td><td>the expression</td></tr></tbody></table></div><h3><a name="xmlExpStringDerive" id="xmlExpStringDerive"></a>Function: xmlExpStringDerive</h3><pre class="programlisti