-
Universe
A mapping of the data structure found in databases: tables, columns, joins, etc. A universe, which is made up of classes, objects, and conditions, can represent any specific application, system, or group of users.
-
Equi-join
A join based on the equality between the values in the column of one table and the values in the column of another. Because the same column is present in both tables, the join synchronizes the two tables.