private function AddSitemapRelevanceField()
    {
        $name = 'SitemapRelevance';
        $value = $this->page->Exists() ? 10* $this->page->GetSitemapRelevance() : 7;
        $field = new Select($name, $value);
        for ($val = 0; $val <= 10; ++$val)
        {
            $decSep = Trans('Core.DecimalSeparator');
            $thousSep = Trans('Core.ThousandsSeparator');
            $text = number_format($val / 10, 1, $decSep, $thousSep);
            $field->AddOption($val, $text);
        }
        $this->AddField($field);
    }