reference

sitemap.xml

Generate lastmod from the file's own timestamp rather than typing it. A hand-written date is a claim that goes stale silently, in the one document whose entire job is reporting change. This site's own is at /sitemap.xml.

<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
  <url>
    <loc>https://example.org/page</loc>
    <!-- move this only when the file itself moves -->
    <lastmod>2026-08-10</lastmod>
  </url>
</urlset>