code: public void processingInstruction(String target, String data)
            throws SAXException
    {
  
      if (DEBUG)
        System.out.println("TransformerHandlerImpl#processingInstruction: "
                           + target + ", " + data);
  
      if (m_contentHandler != null)
      {
        m_contentHandler.processingInstruction(target, data);
      }
    }
docs: Filter a processing instruction event.
  
  @param target The processing instruction target.
  @param data The text following the target.
  @throws SAXException The client may throw
  an exception during processing.
  @see org.xml.sax.ContentHandler#processingInstruction