title: Can I put a <section> inside a <header>?
body: <p>I have not been able to find a reference describing the relationship between the HTML5 tags <code>header</code> and <code>section</code> (or <code>footer</code> and <code>section</code>). Most examples put <code>p</code> elements inside headers and footers.</p>
  
  <p>Is it both legal and advisable to put a <code>section</code> element into a header?</p>
  
  <p>References:</p>
  
  <ul>
  <li><a href="http://html5doctor.com/the-main-element/" rel="nofollow noreferrer">The main element</a> - you may not put a <code>main</code> element into an <code>article</code></li>
  <li>"Nesting &lt;article&gt; in &lt;section&gt; or Vice Versa?" in <a href="https://www.w3schools.com/html/html5_semantic_elements.asp" rel="nofollow noreferrer">HTML5 semantic elements</a> - putting an <code>article</code> into a <code>section</code> is valid, and the other way round (although different semantics)</li>
  </ul>