The information system as a competitive weapon
Communications of the ACM - Special section on management of information systems
A federated architecture for information management
ACM Transactions on Information Systems (TOIS)
Harvard Business Review
Stategic alternatives and inter-organizational system implementations: an overview
Journal of Management Information Systems
A comparative analysis of methodologies for database schema integration
ACM Computing Surveys (CSUR)
A framework of composite information systems for strategic advantage
Proceedings of the Twenty-First Annual Hawaii International Conference on Decision Support and Knowledge Based Systems Track
Integrating disparate databases for composite answers
Proceedings of the Twenty-First Annual Hawaii International Conference on Software Track
Evolution towards strategic applications of databases through composite information systems
Journal of Management Information Systems
ACM Transactions on Information Systems (TOIS) - Special issue: selected papers from the conference on office information systems
Information Resources Management in Heterogeneous, Distributed Environments: A Metadatabase Approach
IEEE Transactions on Software Engineering
Metadatabase solutions for enterprise information integration problems
ACM SIGMIS Database
The model-assisted global query system for multiple databases in distributed enterprises
ACM Transactions on Information Systems (TOIS)
Integrating information from multiple independently developed data sources
Proceedings of the seventh international conference on Information and knowledge management
A Polygen Model for Heterogeneous Database Systems: The Source Tagging Perspective
VLDB '90 Proceedings of the 16th International Conference on Very Large Data Bases
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Timely access to multiple disparate databases which were independently developed and administered to produce composite information has become increasingly critical for organizations to gain competitive advantage. However, many inter-database problems such as inconsistency, ambiguity, and contradiction remain unresolved. This paper presents an approach for resolving these problems. The techniques employed in this approach include schema integration, inter-database tables, attribute subsetting, object hierarchies, and heuristic rules. Schema integration techniques resolve the incompatibilities among the databases at the schema level. Inter-database tables resolve the semantic inconsistency and concept granularity at the instance value level. The inter-database instance identification table identifies an instance across databases. Object hierarchies represent schemata as well as instances. Finally, heuristic rules are used to facilitate the construction of the inter-database instance identification table and the production of composite information.