Test for All Values
iff_all_vals.RdReturns TRUE if, and only if, all values are present in x and ONLY
those values are present in x.
Value
TRUE or FALSE. When FALSE, missing and/or extra attributes will be
included to assist in identifying non-conformity.
See also
Other predicates:
all_duplicated(),
char_val_predicates,
is_curie(),
is_invariant(),
lgl_predicates,
num_val_predicates,
obo_ID_predicates