I've put together a page on the Wiki that lists all the fields supported by Logos resources. Believe it or not there are 133 of them. In my view, that's too many.
For example, three old resources use the topic field, whilst some newer resources use the title field in the same way, and journals use heading. UBS4 uses headtitle! Other resources use tag.
There's both a mscule and miniscule, which apparently mean the same thing, as do rtitle and review.