code: private Class getClassForElementName(String name) {
  		Class clazz = (Class) nameToClass.get(name);
  		if (clazz != null) {
  			return clazz;
  		}
  		
  		if (defaultPackage != null) {
  			try {
  				return Class.forName(defaultPackage+"."+name);
  			} catch (ClassNotFoundException e) {
  				// ignore, it's just not there
  			}
  		}
  		
  		return null;
  	}
docs: Deterine the name of the class that should be used for a given
  XML element name.
  
  @param name The name of the XML element
  @return The class to be used or null if none can be found