code: public void cdata(char ch[], int start, int length)
  			throws SAXException {
  		if (isOutsideDocElem()
  				&& XML.isWhiteSpace(ch, start, length))
  			return; // avoid DOM006 Hierarchy request error
  
  		String s = new String(ch, start, length);
  
  		CDATASection section = (CDATASection) m_currentNode.getLastChild();
  		section.appendData(s);
  	}
docs: Receive notification of cdata.
  
  <p>
  The Parser will call this method to report each chunk of character data.
  SAX parsers may return all contiguous character data in a single chunk,
  or they may split it into several chunks; however, all of the characters
  in any single event must come from the same external entity, so that the
  Locator provides useful information.
  </p>
  
  <p>
  The application must not attempt to read from the array outside of the
  specified range.
  </p>
  
  <p>
  Note that some parsers will report whitespace using the
  ignorableWhitespace() method rather than this one (validating parsers
  must do so).
  </p>
  
  @param ch
  The characters from the XML document.
  @param start
  The start position in the array.
  @param length
  The number of characters to read from the array.
  @see #ignorableWhitespace
  @see org.xml.sax.Locator
  @throws SAXException