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S.: Object normal forms and dependency constraints for object-oriented schemata (1997)
| Content Provider | CiteSeerX |
|---|---|
| Author | Tari, Zahir Stokes, John Spaccapietra, Stefano |
| Abstract | We address the development of a normalization theory for object-oriented data models that have common features to support object identity and complex objects. We first provide an extension of functional dependencies to cope with the richer semantics of relationships between objects, called path dependency, local dependency, and global dependency constraints. Using these dependency constraints, we provide normal forms for object-oriented data models based on the notions of user interpretation (user-specified dependency constraints) and object model. In contrast to conventional data models in which a normalized object has a unique interpretation, in object-oriented data models, an object may have many multiple interpreta-tions that form the model for that object. An object will then be in a normal form if and only if the user’s interpretation is derivable from the model of the object. Our normalization process is by nature iterative, in which objects are restructured until their models reflect the user’s interpretation. |
| File Format | |
| Journal | ACM Trans. Database Syst |
| Language | English |
| Publisher Date | 1997-01-01 |
| Access Restriction | Open |
| Subject Keyword | Dependency Constraint Object-oriented Schema Object Normal Form User Interpretation Object-oriented Data Model Normal Form Object Model Functional Dependency Normalization Theory Global Dependency Constraint User-specified Dependency Constraint Common Feature Unique Interpretation Object Identity Conventional Data Model Complex Object Nature Iterative Local Dependency Many Multiple Interpreta-tions Normalized Object Path Dependency Normalization Process |
| Content Type | Text |
| Resource Type | Article |
