Thanks AL.
I only need the docs for the baseline tables not the plugins created by other developers outside of the moodle core.
Did you ever figure out more information about the origin field, Jerry? I'm also trying to get a better understanding. We have 2,849,798 records with empty values in that field. I'm trying to figure out what would cause that and if there might be any connection with your other post: https://moodle.org/mod/forum/discuss.php?d=356694
Unfortunately, you'll have to dig into the code and see how these fields are used
I'm not an advocate of "the code is the documentation" but this is often the case.