A dimension set is a unique combination of dimension values. It is stored as dimension set entries in the database. Each dimension set entry represents a single dimension value. The dimension set is identified by a common dimension set ID that is assigned to each dimension set entry that belongs to the dimension set.

The following example shows a dimension set that has three dimension set entries. The dimension set is identified by a dimension set ID, which is 108.

Dimension sets are stored in the Dimension Set Entry table as dimension set entries with the same dimension set ID.

When you create a new journal line, document header, or document line, you can specify a combination of dimension values. Instead of explicitly storing each dimension value in the database, a dimension set ID is assigned to the journal line, document header, or document line to specify the dimension set.

When you edit and close the Edit Dimension Set Entries window, a check is performed to see whether the combination of dimension values exists as a dimension set in the table. If the combination occurs in the table, then the corresponding dimension set ID is assigned to the journal line, document header, or document line. Otherwise, a new dimension set is added to the table, and the new dimension set ID is assigned to the journal line, document header, or document line.

By storing dimension sets once in the database, database space is preserved, and overall performance is improved.