text: /**
   * NOVIUS OS - Web OS for digital communication
   *
   * @copyright  2011 Novius
   * @license    GNU Affero General Public License v3 or (at your option) any later version
   *             http://www.gnu.org/licenses/agpl-3.0.html
   * @link http://www.novius-os.org
   */
  
  ALTER TABLE `nos_blog_post`
    ADD `post_publication_start` DATETIME NULL DEFAULT NULL AFTER `post_published` ,
    ADD `post_publication_end` DATETIME NULL DEFAULT NULL AFTER `post_publication_start`;
  