public function fork()
{
$r = new DokumentRevision($this->getStorage());
$r->setDokumentID($this->getDokumentID());
$r->setGliederungID($this->getGliederungID());
$r->setKategorieID($this->getKategorieID());
$r->setStatusID($this->getStatusID());
$r->setIdentifier($this->getIdentifier());
$r->setLabel($this->getLabel());
$r->setContent($this->getContent());
$r->setData($this->getData());
$r->setFileID($this->getFileID());
foreach ($this->getFlags() as $flag) {
$r->setFlag($flag);
}
return $r;
}