$this->db = $db;
$this->history = $history;
$this->writer = new XmlDumpWriter( $text, self::schemaVersion() );
$this->sink = new DumpOutput();
$this->text = $text;
$this->db = $db;
$this->history = $history;
$this->writer = new XmlDumpWriter( $text, self::schemaVersion() );
$this->sink = new DumpOutput();
$this->text = $text;