aTbRef has been updated for v8.8.0: https://www.acrobatfaq.com/atbref8/index.html. Note you may need to refresh your browser cache to see the new pages.
A slight delay for once as the release caught me on a brief holiday in the countryside (COVID-compliant!) with less fulsome data access than I’m used to.
The change log is here: https://www.acrobatfaq.com/atbref8/index/ChangeLog/v880b4796Oct2020.html
One change of note is mainly labelling: Key Attributes are now Displayed Attributes - see more. This may confuse us long term users a bit, but I think it is a change for the best as some people thought the word ‘key’ implied a significance that wasn’t there. I think the new labelling is better in the long term.
This update meant a lot of changes to the aTbRef TBX and scope for errors/breakage. So: missing images, broken links, link anchors on the wrong words etc. If you spot these please let me know whether here or via email so I can fix errors as soon as possible,