Relationship Types

Posted by AJ × 03:41

In the refined design, some attributes from the initial entity types are refined into

relationships:

Manager of DEPARTMENT -> MANAGES

Works_on of EMPLOYEE -> WORKS_ON

Department of EMPLOYEE -> WORKS_FOR etc

In general, more than one relationship type can exist between the same participating

entity types MANAGES and WORKS_FOR are distinct relationship types between

EMPLOYEE and DEPARTMENT

Different meanings and different relationship instances.

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