Thanks for your message. I'll defer to other community members to respond, as I do not personally have updated documentation. You might start here though: https://openacs.org/doc/ .
This:
https://openacs.org/about/what-is-openacs
and this:
https://openacs.org/forums/message-view?message_id=274218
might also be useful.
Good Luck,
Cesar Brea
