function admin_delete_metadata()
 {
     $md = $this->_controler->_actionParams['md'];
     $name = $md->getName();
     $mdFactory = new Docman_MetadataFactory($md->getGroupId());
     $deleted = $mdFactory->delete($md);
     if ($deleted) {
         $this->_controler->feedback->log('info', $GLOBALS['Language']->getText('plugin_docman', 'md_del_success', array($name)));
     } else {
         $this->_controler->feedback->log('error', $GLOBALS['Language']->getText('plugin_docman', 'md_del_failure', array($name)));
     }
     $this->_controler->view = 'RedirectAfterCrud';
     $this->_controler->_viewParams['default_url_params'] = array('action' => 'admin_metadata');
 }