2013-04-09, 21:36:13
A sitemap can be referenced in robots.txt so that you don't need google to autodiscover it or manually submit using google webmaster tools: http://support.google.com/webmasters/bin/answer.py?hl=en&answer=183669
Quote:Submit a Sitemap using robots.txt
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