Order modifiers, what does the term "TV" denote?

[paxi]

So this is extracted from the Order Tags for a particular order:

'[{“MI”:59,“OI”:1,“OK”:“000010”,“PN”:“Normal”,“PR”:110.00,“Q”:1,“TN”:“Burger Modifiers”,"TV":“Extra Beef Patty”,“UI”:2},{“MI”:62,“OI”:1,“OK”:“000030”,“PN”:“Normal”,“PR”:30.00,“Q”:1,“TN”:“Burger Modifiers”,“TV”:“Extra Cheese”,“UI”:2}]

[vuongduongquoc]

I guess
TN=TAG NAME?
TV= TAG VALUE?

[gerlandog]

TV means TAG VALUE
TN means TAG NAME

G.