Why Object-Oriented DBMS?

• Abstract data types

• Interface with host programming language (the impedance mismatch).

• Object identity:

  • (peter, 40, {(john, 15, {})})
  • (susan, 41, {(john, 15, {})})
• Same son? Maybe, maybe not.

• Managing large number of objects:

  • Encapsulation, reusability, modularity, protection, less distinction between program and data, type extensibility

• Semantic networks: the world is actually a complex hierarchy (types versus classes).

Next slide

Back to first slide

View graphic version