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Serving Static Files from Apache
The Apache rewrite rules defined in Deployment reference guide (see the Apache settings section) allow for files to be served by the Apache web server rather than passing the request to the application server.
This gives you the ability to place files at the root of your URL structure where search engines expect to find them. Good examples are Sitemap.xml and Robots.txt.
First, determine the "Document Root" defined in the VirtualHost tag of your web server configuration (httpd.conf file). For example on Linux the document root might be "/var/www". Place your sitemap and robots files in that directory and make sure permissions are set so that the web server has read access to the files.
Now you should see the files by accessing them with the following URL structure:
http://www.yourdomain.com/Sitemap.xml