Distributed databases principles and systems
Distributed databases principles and systems
A comparative analysis of methodologies for database schema integration
ACM Computing Surveys (CSUR)
Superviews: Virtual Integration of Multiple Databases
IEEE Transactions on Software Engineering
Integrity = validity + completeness
ACM Transactions on Database Systems (TODS)
Federated database systems for managing distributed, heterogeneous, and autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
Interoperability of multiple autonomous databases
ACM Computing Surveys (CSUR) - Special issue on heterogeneous databases
ACM SIGMOD Record - Directions for future database research & development
Data fusion in robotics and machine intelligence
Data fusion in robotics and machine intelligence
ACM Transactions on Database Systems (TODS)
Data model and query evaluation in global information systems
Journal of Intelligent Information Systems - Special issue: networked information discovery and retrieval
Answering queries using views (extended abstract)
PODS '95 Proceedings of the fourteenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Query reformulation for dynamic information integration
Journal of Intelligent Information Systems - Special issue on intelligent integration of information
Not all answers are equally good: estimating the quality of database answers
Flexible query answering systems
Multidatabase Interoperability
ACM SIGMOD Record
Principles of Database Systems
Principles of Database Systems
Multidatabase Systems: An Advance Solution for Global Information Sharing
Multidatabase Systems: An Advance Solution for Global Information Sharing
Database Integration in a Distributed Heterogeneous Database System
Proceedings of the Second International Conference on Data Engineering
Theory of Relational Databases
Theory of Relational Databases
Computing queries from derived relations
VLDB '85 Proceedings of the 11th international conference on Very Large Data Bases - Volume 11
Autoplex: Automated Discovery of Content for Virtual Databases
CooplS '01 Proceedings of the 9th International Conference on Cooperative Information Systems
Consistent query answers in virtual data integration systems
Inconsistency Tolerance
TupleRank: ranking discovered content in virtual databases
NGITS'06 Proceedings of the 6th international conference on Next Generation Information Technologies and Systems
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The integration of information from multiple databases has been an enduring subject of research for over 20 years, and many different solutions have been attempted or proposed. Missing from this research has been a uniform framework. Usually, each solution develops its own ad-hoc framework, designed to address the particular aspects of the problem that are being attacked and the particular methodology that is being used. To address this situation, in this paper we define a formal model for multidatabases, which we call Multiplex. Multiplex is a simple extension of the relational model, which may serve as a uniform abstraction for many previous ad-hoc solutions. Multiplex is based on formal assumptions of integrability, which distinguish between scheme and instance reconcilability among independent databases. Multiplex supports database heterogeneity, and it provides several degrees of freedom that allow it to model actual situations encountered in multidatabase applications. In addition, in situations in which a single answer is not obtainable (either because the global query is not answerable, or there are multiple candidate answers), Multiplex defines approximative answers. Finally, Multiplex provides a practical platform for implementation. A prototype of such an implementation is described briefly.