When you import relational data objects, the Developer tool retains the primary key information defined in the database. When you import related relational data objects at the same time, the Developer tool also retains foreign keys and key relationships. However, if you import related relational data objects separately, you must re-create the key relationships after you import the objects.

To create key relationships between relational data objects, first create a primary key in the referenced object. Then create the relationship in the relational data object that contains the foreign key.

The key relationships that you create exist in the relational data object metadata. You do not need to alter the source relational resources.