A sitemap-of-sitemaps XML index. Use when a single sitemap.xml would exceed 50k URLs or 50MB.
<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap>
<loc>https://example.com/sitemap-posts.xml</loc>
<lastmod>2026-05-27</lastmod>
</sitemap>
<sitemap>
<loc>https://example.com/sitemap-pages.xml</loc>
<lastmod>2026-05-27</lastmod>
</sitemap>
<sitemap>
<loc>https://example.com/sitemap-products.xml</loc>
<lastmod>2026-05-27</lastmod>
</sitemap>
</sitemapindex>