</td></tr><tr><td><span class="term"><i><tt>warn</tt></i>:</span></td><td>the warning function result</td></tr><tr><td><span class="term"><i><tt>ctx</tt></i>:</span></td><td>the functions context result</td></tr><tr><td><span class="term"><i><tt>Returns</tt></i>:</span></td><td>-1 in case of error and 0 otherwise</td></tr></tbody></table></div><h3><a name="xmlSchemaIsValid" id="xmlSchemaIsValid"></a>Function: xmlSchemaIsValid</h3><pre class="programlisting">int	xmlSchemaIsValid		(<a href="libxml-xmlschemas.