k-anonymity metric, used for analysis of reidentification
risk.
Message indicating that multiple rows might be associated to a
single individual. If the same entity_id is associated to
multiple quasi-identifier tuples over distinct rows, we
consider the entire collection of tuples as the composite
quasi-identifier. This collection is a multiset: the order in
which the different tuples appear in the dataset is ignored,
but their frequency is taken into account. Important note: a
maximum of 1000 rows can be associated to a single entity ID.
If more rows are associated with the same entity ID, some
might be ignored.
