<!DOCTYPE html>
<html lang="de">
html (Wurzel)<br>
<head>
....head<br>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>DOM</title>
</head>
<body>
....body
<main>
........main
<section>
............section
<div>
................div
<article>
....................article
<div>
........................div (Blatt)
</div>
</article>
<aside>
....................aside
<div>
........................div (Blatt)
</div>
</aside>
</div>
</section>
</main>
</body>
</html>