protected static function splitUrlVersion($version)
    {
        $pos = strpos($version, '#');

        // number version or empty version
        if (false !== $pos) {
            $url = substr($version, 0, $pos);
            $version = substr($version, $pos);
        } else {
            $url = $version;
            $version = '#';
        }

        return array($url, $version);
    }