public function romandenomrulerAction()
 {
     if ($this->_getParam('term', false)) {
         $rulers = new Rulers();
         $ruler_options = $rulers->getRomanDenomRuler($this->_getParam('term'));
         if ($ruler_options) {
             echo Zend_Json::encode($ruler_options);
         } else {
             $data = array(array('id' => NULL, 'term' => 'No options available.'));
             echo Zend_Json::encode($data);
         }
     } else {
         $response = array(array('id' => NULL, 'term' => 'No ruler specified'));
         echo Zend_Json::encode($response);
     }
 }