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The Drupal XML Sitemap module automatically creates and updates an XML sitemap which will show up at http://pathtoyoursite.com/sitemap.xml and can help to guide search engines indexing the website. HoweverBy default, it the sitemap does not include links to Islandora repository objects by defaultand you have to configure it. By using the Drupal XML Sitemap Custom module together with the Islandora XML Sitemap module, URLs for Islandora objects will be automatically added to the XML sitemap module database as custom links. Including Islandora objects in the Drupal sitemap makes them more likely to be correctly indexed by search engines.
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Installation
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Once you've configured the sitemap, your site map will show up at at http://pathtoyoursite.com/sitemap.xml
You can edit that default sitemap and can create and manage additional sitemaps by visiting admin/config/search/xmlsitemap .