/**
  * Override the default constructor to load the extension constants
  * before dataProvider is called
  * 
  * @param string $name
  * @param array $data
  * @param string $dataName
  */
 public function __construct($name = null, array $data = array(), $dataName = '')
 {
     parent::__construct($name, $data, $dataName);
     common_ext_ExtensionsManager::singleton()->getExtensionById('taoDeliveryRdf');
 }