code: public void processingInstruction(String target, String data) throws SAXException {
  		emitWhitespace();
  		super.processingInstruction(target, data);
  	}
docs: Filter a processing instruction event.
  
  @param target
  The PI target.
  @param data
  The PI data.
  @exception org.xml.sax.SAXException
  If a filter further down the chain raises an exception.
  @see org.xml.sax.ContentHandler#processingInstruction