code: def heading_title(self):
          
          art_title = self.article.root.xpath('./front/article-meta/title-group/article-title')[0]
          article_title = deepcopy(art_title)
          article_title.tag = 'h1'
          article_title.attrib['id'] = 'title'
          article_title.attrib['class'] = 'article-title'
          return article_title
docs: Makes the Article Title for the Heading.
  
          Metadata element, content derived from FrontMatter