# B or C
A.cont=B&A.cont=C; A.cont=B,C >> A: {$in: [B, C]}
A.ncont=B >> A: {$nin: B} # must not contain key A or if present not equal to B or if a list,
- # it must not not contain B
+ # it must not contain B
A.ncont=B,C; A.ncont=B&A.ncont=C >> A: {$nin: [B,C]} # must not contain key A or if present not equal
# neither B nor C; or if a list, it must not contain neither B nor C
A.ne=B&A.ne=C; A.ne=B,C >> A: {$nin: [B, C]}