|1.||The U-shaped symbols on each line connecting a subtype to the circle, indicates that the subtype is a
direction of supertype/subtype relationship.
|2.||The uses of specialisation or generalisation technique for a particular situation depends on
the nature of the problem.
the nature of the entities and relationships.
the personal preferences of the database designer.
|3.||In specialisation, the differences between members of an entity is
|4.||In generalisation, the differences between members of an entity is
|5.||Specialisation is a
top-down process of defining superclasses ...