| E. Bertino et al. An Object-Oriented Approach to the Interconnection of Heterogeneous Databases. In Workshop on Heterogeneous Databases, Northwestern University, USA, pages 84--90, 1989. |
....available technology. As these evolve over time, an organisation can end up having several possibly heterogeneous data management systems. Sometimes, the choice of a data management system is dictated by performance considerations, and not all data sources may belong to the organisation using them [BER89]. Therefore, several types of heterogeneity are likely even within a single organisation. Because of the complex nature of the problems addressed in this research, it should not be carried out in an unfocused way, but directed towards the stated primary goals. So we decided to investigate only ....
E. Bertino et al. An Object-Oriented Approach to the Interconnection of Heterogeneous Databases. In Workshop on Heterogeneous Databases, Northwestern University, USA, pages 84--90, 1989.
....component schemas in an uniform way. This model is called canonical data model and it must be as semantically rich as possible. Thus, most existing approaches refer to an object oriented data model, since it can express more information about the universe of discourse than any traditional model ( BNPS89] SCGS91] SPSY93] CSGS94] Preintegration is the first phase of the schema integration process and it involves semantic enrichment of the local schema and translation of enriched local schemas into component schemas expressed in the canonical data model of the federation. This is a very ....
E. Bertino, M. Negri, G. Pelagatti, and L. Sbattella. An Object-Oriented Approach to the Interconnection of Heterogeneous Databases. In Workshop on Heterogeneous Database Systems, Chicago, pages 81--87, Dec 1989.
....and remote transparency. We expect that MODM will eventually incorporate some of the concepts from [31, 35] for additional support in the unification process. Some of the advantages of using an object based common data model include the ability to encapsulate the functionality of shared objects [5], its extensible nature [32] and object uniformity [8] This last item is especially important for the unification phase where one can ask about the equivalence of actual data values, types, and operations. 5.2 Relationships Among Objects Before we present the details of our approach to ....
E. Bertino, G. Pelagatti, and L. Sbattella. An Object-Oriented Approach to the Interconnection of Heterogenous Databases. In Proceedings of the Workshop on Heterogenous Databases. NSF, December 1989.
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