 warn, <br />					 void * ctx)<br />
</pre><p>Set the error and warning callback informations</p>
<div class="variablelist"><table border="0"><col align="left" /><tbody><tr><td><span class="term"><i><tt>ctxt</tt></i>:</span></td><td>a schema validation context</td></tr><tr><td><span class="term"><i><tt>err</tt></i>:</span></td><td>the error function</td></tr><tr><td><span class="term"><i><tt>warn</tt></i>:</span></td><td>the warning function</td></tr><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></t