public function replace($sTarget, $sAttribute, $sSearch, $sData)
    {
        return $this->addCommand(
            array(
                'cmd' => 'rp',
                'id' => trim((string)$sTarget, " \t"),
                'prop' => trim((string)$sAttribute, " \t")
            ),
            array(
                's' => trim((string)$sSearch, " \t\n"),
                'r' => trim((string)$sData, " \t\n")
            )
        );
    }