Abstract
The ODMG standard does not incl ude the ‘definition of derived classes’, characteristic that has been recognized as a fundamental aspect for the development of object-oriented applicati ons in order to customize existent classes. For the purpose of not subtracting functionality to object-oriented databases (OODB) with respect to relational databases, a mechanism to define derived classes must be offered. Such a mechanism, which allows the dynamic selection of objects, can be used as a shorthand in queries, and makes easier the integration of heterogeneous databases. Besides, to define derived classes, the problem of obtaining the identifiers of their objects must be solved. In this paper, we propose a mechanism to define derived classes in ODMG. In our mechanism, the identifiers of the new objects are defined according to their core attributes only.
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Garví, E., Samos, J., Torre, M. (2004). Definition of Derived Classes in ODMG Databases. In: Galindo, F., Takizawa, M., Traunmüller, R. (eds) Database and Expert Systems Applications. DEXA 2004. Lecture Notes in Computer Science, vol 3180. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-30075-5_62
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DOI: https://doi.org/10.1007/978-3-540-30075-5_62
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