Section Elements
html.spec.whatwg.org/multipage/sections.html
body, article, section, nav, aside, h1, h2, h3, h4, h5, h6, hgroup, header, footer, address
<body> </body>
<article> </article>
<section> </section>
<nav> </nav>
<aside> </aside>
<h1> </h1>
<h2> </h2>
<h3> </h3>
<h4> </h4>
<h5> </h5>
<h6> </h6>
<header> </header>
<footer> </footer>
<address> </address>