Submitting Sitemaps using your robots.txt file

You can tell Google and other search engines about your Sitemap by adding the following line to your robots.txt file (updating the sample URL with the complete path to your own Sitemap):

Sitemap: http://example.com/sitemap_location.xml

This directive is independent of the user-agent line, so it does not matter where you place it in your file. If you have a Sitemap index file, you can include the location of just that file. You do not need to list each individual Sitemap listed in the index file.