A sitemap is a list of pages on a website.
Examples of corporate or other organization sites with sitemaps.
Some sites have subsites, e.g. at subdomains, which have their own sitemaps.
Yahoo (note the inconsistent paths and presentations)
- Google used to have a sitemap at http://www.google.com/sitemap.html however that now redirects to http://www.google.com/about/products/ which still resembles a sitemap but it's not clear if that's its intent (judging by the renaming)
See http://microformats.org/wiki/sitemap for the effort to develop a sitemap microformat to markup visible sitemap pages for semantic crawling and indexing, eliminating any need for a separate XML sitemap sidefile.
There is also an XML sitemap file format:
Why XML sitemap
XML sitemap indexing
Google Webmaster Tools suggests creating an XML file in the sitemaps.org format and submitting it with the claim that their crawler can "more intelligently crawl your site". Despite that, they also say that using a sitemap "doesn't guarantee you that all the web pages listed in your sitemap can be crawled or indexed".
XML sitemap unnecessary
On 2014-12-18, Aaron Parecki discovered that his sitemap.xml file had been empty, with no idea of how long it had been empty. Despite that, his content continues to be indexed by Google.
IndieWeb XML sitemaps
- http://bret.io/sitemap (XML)