Controlling Aggregation in Distributed Object Systems: A Graph-Based Approach
IEEE Transactions on Parallel and Distributed Systems
Constructing IDL Views on Relational Databases
CAiSE '99 Proceedings of the 11th International Conference on Advanced Information Systems Engineering
Documenting Legacy Relational Databases
ER '99 Proceedings of the Workshops on Evolution and Change in Data Management, Reverse Engineering in Information Systems, and the World Wide Web and Conceptual Modeling
Deciding on the Equivalence of a Relational Schema and and Object-Oriented Schema
DEXA '00 Proceedings of the 11th International Conference on Database and Expert Systems Applications
Building and maintaining ontologies: a set of algorithms
Data & Knowledge Engineering - NLDB2002
Extracting generalization hierarchies from relational databases: A reverse engineering approach
Data & Knowledge Engineering
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Addresses the design of the reengineering service for the DOK (Distributed Object Kernel) federated database. This service allows the hiding of the heterogeneity of databases involved in a federation by generating object-oriented representations from their corresponding schemata. We propose a complete methodology that supports the identification and the translation of both the explicit and implicit information. The identification of object-oriented constructs is performed by classifying a relational schema into different categories of relations, namely base, dependent and composite relations. The main difficulty in designing the reengineering service relies on the distinction between the different types of relationships amongst classes. Our approach deals with this problem by analysing relations according two types of correlation: (i) the degree of correlation between the external and primary keys, and (ii) the degree of correlation between sets of tuples in the relations. Examining these correlations uncovers implicit relationships contained as well-hidden classes in a relational schema.