I’ve just recently started drafting a new wiki page documenting unofficial folksonomy tagging standards, and I welcome others to contribute~
https://wiki.musicbrainz.org/Draft:Folksonomy_tagging_standards
this is not meant to be a complete listing of every single tag, but a list of tag conventions used by editors, be it car on cover, long title, or list song (there is some bias here, since I think I’m the only contributor so far)
I’ll prolly eventually format the lists as tables, but I wanted to get a start without having to remember how wiki tables work~ 
(also yes, I’m aware that currently most of the links are broken due to URL spaces not being handled properly, I’ll make a seperate thread for that issue)