at the moment, i'm thinking of compiling only tags used so far in danbooru or at least has one entry. by that we can be sure that at least one user is familiar with the term. introducing a term not yet used is secondary for me unless it will help in organizing and cleaning some unclear entries.
we can always add the specific terms when necessary especially when users became familiar of such list and that a specific armor piece is not yet tagged.
i considered the divisions be by category (head, leg, arms,shoulders, torso/body, sets, shields, personalities, groin, named armor, misc). aside from that maybe are japanase, ancient/medieval, contemporary, and future.
groin - bikini armor, crotch plate
by sets i mean full_armor, samurai_armor, power_armor, power_suit, exoskeleton.
personalities - knight, samurai, dark_night, soldier, polish hussar, swiss guard
i'm thinking of materials too like metal and leather, but im not sure to use it. i like too but should we use it?
EDIT: i uploaded the list of armor page already. armor list sounds better, but i followed list of weapons for consistency. i might have missed something or added something irrelevant. kindly check. we can always expand it or change the divisions. i've selected the categories that a user will most likely looked into. thanks.