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+# Sitemap support
+
+This class allow to read the sitemaps files available in websites. This files
+allow to provide web crawlers all the interesting URL to crawl, some optional
+other sitemaps files and some parameters concerning the last update of the
+pages.
+
+Two formats are available : a textual one and a XML one.
+The texutal format is simple : all the URL are written, one by line.
+The XML allow to provide more data like the change frequency, the priority and
+the last modification date