Add Relationships
After harvesting a model, one may navigate to the object page for any classifier level object (e.g., table, view, entity, etc.) and click the Relationships tab. Here you may add custom relationships (based upon the metamodel) to the object.
Defines
Data documentation type relationships.
ER Destination / Source
In some cases there is little to do as some databases will already have a very complete set of primary/foreign key relationships defined and thus this information is harvested as relationships in the model, such as the first one above between the PurchaseOrder and Vendor tables. Again, these are allowed by the metamodel.
Others
Any other relationships defined in the metamodel.