function _parse()
    {
        $this->serviceList = array();

        $services = $this->parser->evalXPath('xrd:Service', $this->xrdNode);

        foreach ($services as $node) {
            $s = new Auth_Yadis_Service();
            $s->element = $node;
            $s->parser = $this->parser;

            $priority = $s->getPriority();

            if ($priority === null) {
                $priority = SERVICES_YADIS_MAX_PRIORITY;
            }

            $this->_addService($priority, $s);
        }
    }