<td>an expression context</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>the number of nodes in use or -1 in case of error</td></tr></tbody></table></div></div>
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        <div class="refsect2" lang="en"><h3><a name="xmlExpDump"/>xmlExpDump ()</h3><pre class="programlisting">void	xmlExpDump			(<a href="libxml2-tree.html#xmlBufferPtr">xmlBufferPtr</a> buf, <br/>					 <a href="libxml2-xmlregexp.html#xmlExpNodePtr">xmlExpNodePtr</a> expr)<br/>
</pre><p>Serialize the e