* java.lang.String, java.lang.String, org.xml.sax.Attributes)
*/
public void startElement(String uri, String localName, String qName,
Attributes attributes) throws SAXException {
String mn = attributes.getValue("name");
ChainMapper cm = new ChainMapper();
cm.setName(mn);
/* add chain registered chains */
maps.put(mn, cm);
push(cm);
}