function performOutput( $dom )
    {
        $this->XMLSchema = eZXMLSchema::instance();
        $this->NestingLevel = 0;
        $this->Output = '';
        $sectionLevel = -1;

        $this->createLinksArray( $dom );

        $this->outputTag( $dom->documentElement, $sectionLevel );

        return $this->Output;
    }