Keys enable definition of privileged accesses enabling switching from one table to another as well as the corresponding integrity checks.

The Key of a Table is constituted from a set of Columns. The primary Key enables identification of the record in a unique way. It is connected to the Columns that constitute it, and if necessary to the Role or the Association that justifies it.

A foreign Key is constituted of Columns that make reference to the primary Key of a parent Table to which it is connected by a Migratory link.

HOPEX Data Architecture Physical Layer, HOPEX NAF, HOPEX DoDAF V2, HOPEX Data Governance.