Working with CMR Relationship Mappings

Relational mappings define how persistent objects reference other persistent objects. TopLink furnishes the following relationship mappings:

One-to-one mappings - Map a reference to another EJB object to the database (see "Working with One-to-One Mappings" ).
One-to-many mappings - Map collections of persistent objects to the database (see "Working with One-to-Many Mappings" ).
Many-to-many mappings - Use an association table to map EJB collections of persistent objects to the database (see "Working with Many-to-Many Mappings" ).

Relationships between entity beans should be independent.