private void parse(String filename){

		try {			
			// use the default parser
			SAXParserFactory factory = SAXParserFactory.newInstance();
			SAXParser saxParser = factory.newSAXParser();
			// parse the input			
			saxParser.parse(filename, this);
		}
		catch (ParserConfigurationException pce) {
			pce.printStackTrace();
		}		
		catch (SAXException saxe) {			
			saxe.printStackTrace();		
		}		
		catch (IOException ioe) {			
			ioe.printStackTrace();		
		}		

	}