dudas con html5 semantico

[superweb360]

En esta web pone que los <section> pueden contener <article> y también viceversa. http://html5doctor.com/the-article-element/

An <article> with <section>s. You can use the <section> element to split the article into logical groups of content with headings:

Código HTML:

<article>
  <h1>Apple varieties</h1>
  <p>The apple is the pomaceous fruit of the apple tree...</p>
 
  <section>
    <h2>Red Delicious</h2>
    <p>These bright red apples are the most common found in many supermarkets...</p>
  </section>
 
  <section>
    <h2>Granny Smith</h2>
    <p>These juicy, green apples make a great filling for apple pies...</p>
  </section>
    
</article>
 

A <section> containing <article>s

Código HTML:

<section>
  <h1>Articles on: Fruit</h1>
 
  <article>
    <h2>Apple</h2>
    <p>The apple is the pomaceous fruit of the apple tree...</p>
  </article>
 
  <article>
    <h2>Orange</h2>
    <p>The orange is a hybrid of ancient cultivated origin, possibly between pomelo and tangerine...</p>
  </article>
 
  <article>
    <h2>Banana</h2>
    <p>Bananas come in a variety of sizes and colors when ripe, including yellow, purple, and red...</p>
  </article>
    
</section>