code: public void reset ()
      {
      contexts = new Context[32];
      namespaceDeclUris = false;
      contextPos = 0;
      contexts[contextPos] = currentContext = new Context();
      currentContext.declarePrefix("xml", XMLNS);
      }
docs: Reset this Namespace support object for reuse.
  
  <p>It is necessary to invoke this method before reusing the
  Namespace support object for a new session.  If namespace
  declaration URIs are to be supported, that flag must also
  be set to a non-default value.
  </p>
  
  @see #setNamespaceDeclUris