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external identifier (ESN 68156 )

An external identifier is any identification number or code used as a primary key or object identifier in a database which interacts with the Emporis database in any way. External IDs are generally unique numbers or strings in the external database but are not necessarily unique in the Emporis database; for example, one ID in an external database might represent 3 separate objects for Emporis.

A key used to relate objects in the Emporis database with corresponding objects in an external database.