| http://www.w3.org/ns/prov#value | - Drupal (pronounced /??dru??p??l/) is a free and open source[1] Content Management System (CMS) written in PHP and distributed under the GNU General Public License.[2][3] It is used as a back-end system for many different types of websites, ranging from small personal blogs to Enterprise 2.0 collaboration and knowledge management uses to large corporate and political sites, including whitehouse.gov
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