private function build_keywords_view(Article $article)
 {
     $keywords = $article->get_keywords();
     $nbr_keywords = count($keywords);
     $this->view->put('C_KEYWORDS', $nbr_keywords > 0);
     $i = 1;
     foreach ($keywords as $keyword) {
         $this->view->assign_block_vars('keywords', array('C_SEPARATOR' => $i < $nbr_keywords, 'NAME' => $keyword->get_name(), 'URL' => ArticlesUrlBuilder::display_tag($keyword->get_rewrited_name())->rel()));
         $i++;
     }
 }