public function tag()
    {
        $tag = $this->getCurrentTag();

        if ($tag) {
            $this->blogPosts = $tag->BlogPosts();

            if ($this->isRSS()) {
                return $this->rssFeed($this->blogPosts, $tag->getLink());
            } else {
                return $this->render();
            }
        }

        $this->httpError(404, 'Not Found');

        return null;
    }