title: Semantically/accessibly correct use of <details> for an image caption?
body: <p>I have some very long image captions, I would like to use the <code>&lt;details&gt;</code> tag to accommodate these. But I'm not sure how to semantically/accessibly associate details with images in the same way as, for example, <code>figcaption</code> and <code>figure</code>.</p>
  <p>What is the correct way to do this?</p>
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;img src="https://placeimg.com/150/100/nature" alt="Epcot theme park" /&gt;
  &lt;details&gt;
    &lt;summary&gt;Epcot theme park&lt;/summary&gt;
    &lt;p&gt;Epcot is a theme park at Walt Disney World Resort featuring exciting attractions, international pavilions, award-winning fireworks and seasonal special events.&lt;/p&gt;
  &lt;/details&gt;</code></pre>
  </div>
  </div>
  </p>
  <p>Here the alt text and summary title are the same.</p>