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chromium/content/test/data/accessibility/relations/ignore-duplicate-relation-ids.html 

<!--
@WIN-ALLOW:details=*
-->
<!DOCTYPE html>
<html>
  <body>
    <p>This <span aria-details="details2 details2">text</span> has details</p>
    <div role="group" id="details2">Text details</div>
  </body>
</html>