consider the following example (that what I would like to model):
Entity: Department
Attributes: ...whatever...
Relationships:
headOfDepartment --> Employee
viceHeadOfDepartment --> Employee
pointyHairedBoss -->
dilbert -->
other Employees -->>
Entity: Employee
Attributes: ...whatever...
Relationships:
department --> Department
Every Employee is only in one Department. The Department has (and
needs) four special Employees (head, vice head, pointy haired boss,
dilbert). Turns out that it is impossible to model this with
bidirectional relationships if you don't want to model it like that:
Entity: Employee
Attributes: ...whatever...
Relationships:
departmentImHeadOf --> Department
departmentImViceHeadOf --> Department
departmentImPointyHairedBossOf --> Department
departmentImDilbertOf --> Department
departmentOtherEmployeeOf --> Department
The other alternative is to model it with unidirectional relationship,
which is discouraged.
Can anyone gime some advice on this?
Ruotger
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