@silverpill @hongminhee @thisismissem
`summary` could represent *some* kind of accessible information, but it's not obvious to me which kind exactly: should it be an accessible name (<https://developer.mozilla.org/en-US/docs/Glossary/Accessible_name>) or an accessible description (<https://developer.mozilla.org/en-US/docs/Glossary/Accessible_description>)? (Or even an HTML `title` attribute?)
(I think it's unfortunate that we need to reinvent an accessibility tree representation, when an AS2 `content` is just an HTML, which has already been equipped with a feature-rich and battle-tested accessibility framework called ARIA, but I digress.)