function identifiers($metadataPrefix, $from, $until, $set, $offset, $limit, &$total)
{
$records = null;
if (!HookRegistry::call('JournalOAI::identifiers', array($this, $from, $until, $set, $offset, $limit, $total, &$records))) {
$sectionId = null;
if (isset($set)) {
list($journalId, $sectionId) = $this->setSpecToSectionId($set);
} else {
$journalId = $this->journalId;
}
$records = $this->dao->getIdentifiers(array($journalId, $sectionId), $from, $until, $set, $offset, $limit, $total);
}
return $records;
}