1. By Anthony NICOLAIEFF
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2.  Protocol proposed by Google in 2005
 Sitemap = « plan d’un site web »
 It’s a file that shows the architecture of a
website
 languages used:
◦ Text
◦ XML
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3.  Facilitate the indexing of a website
◦ Promotes exploration by crawler
◦ File exclusively used by search engine
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4.  Useful if menus are in Flash or in JavaSpript
◦ Not link HTML so not indexed
 Useful for a website with many pages
◦ Many URLs so indexing time is high without
Sitemap
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5.  12 websites:
◦ 6 with Sitemap submitted to Google and Yahoo
◦ 6 without Sitemap
 Results:
◦ Average time for passage of crawlers with Sitemap:
 Google: 14 min
 Yahoo: 245 min
◦ Average time for passage of crawlers without Sitemap:
 Google: 1375 min
 Yahoo: 1773 min
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6.  « à la mano »:
◦ Requires knowlegde in XML:
 <url><loc>http://www.example.com/?id=who</loc>
<lastmod>2009-09-22</lastmod>
<changefreq>monthly</changefreq>
<priority>0.8</priority> </url>
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7.  Many generators online
 Extensions for CMS
◦ Google XML Sitemaps (Wordpress)
◦ Xmap (Joomla)
◦ Site Map (Drupal)
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8.  If the file is at the root of the website
 Crawler through the file
 If (content of one page has changed)
{
Page is indexed with new content;
}
Else
{
Crawler change page or website;
}
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9.  Economy of banwidth:
◦ If the contents are unchanged, crawler changes
website
◦ Only know if a Sitemap is introduced
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10.  Economy of computer time:
◦ Thanks to Sitemap
 Thanks to this tool, Google is better
compared to others search engines
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