@Override
	public void characters(char ch[], int start, int length) throws SAXException {
		StringBuffer buf = (StringBuffer) characters_stack.peek();
		buf.append(new String(ch, start, length));
		
		if (isVerboseEnough(VERBOSITY_DEBUG)) {
			System.out.println("  characters: [" + new String(ch, start, length) + "]");
		}
	}