/**
  * Responds to the ListIdentifiers and ListRecords verbs.
  *
  * Only called for the initial request in the case of multiple incomplete
  * list responses
  *
  * @uses listResponse()
  */
 private function initListResponse()
 {
     $fromDate = null;
     $untilDate = null;
     if ($from = $this->_getParam('from')) {
         $fromDate = OaiPmhRepository_Date::utcToDb($from);
     }
     if ($until = $this->_getParam('until')) {
         $untilDate = OaiPmhRepository_Date::utcToDb($until);
     }
     $this->listResponse($this->query['verb'], $this->query['metadataPrefix'], 0, $this->_getParam('set'), $fromDate, $untilDate);
 }