 It is possible for an <code>TransformerFactory</code> to expose a feature value but be unable to change its state.
 </p>

 <p>All implementations are required to support the <code><a href="../../../../reference/javax/xml/XMLConstants.html#FEATURE_SECURE_PROCESSING">FEATURE_SECURE_PROCESSING</a></code> feature.
 When the feature is:</p>
 <ul>
   <li>
     <code>true</code>: the implementation will limit XML processing to conform to implementation limits
     and behave in a secure fashion as defined by the 