Complete hierarchically structured representation of all single documents With the Sitemap for search machines concerns a XML file, which contains the URL addresses of the web pages of inclusive some meta data (last actualization, fluctuation, relevance, relation to other URL addresses of the Web appearance), so that the search machines can scan the Web appearance more intelligently. On 16 November Google, Yahoo have 2006! and Microsoft an alliance closed, in order to specify a common standard, how Sitemap information must be structured, so that the search machines can pick these information out by machine. A goal is an improvement of the search results.