chromium/content/test/data/accessibility/html/caption.html

<!--
@BLINK-ALLOW:description*
@WIN-ALLOW:description*
@AURALINUX-ALLOW:description*
@UIA-WIN-ALLOW:FullDescription*
@MAC-ALLOW:AXDescription
@MAC-ALLOW:AXHelp
-->
<!DOCTYPE html>
<html>
<body>

<table>
  <caption>Browser and Engine</caption>
  <tr>
    <th>Browser</th>
    <th>Engine</th>
  </tr>
  <tr>
    <td>Chrome</td>
    <td>Blink</td>
  </tr>
  <tr>
    <td>Safari</td>
    <td>WebKit</td>
  </tr>
</table>

<!-- If there is already a name, the caption becomes a description -->
<table aria-label="Name">
  <caption>Description</caption>
  <tr>
    <td>A</td>
    <td>B</td>
  </tr>
</table>

</body>
</html>