The TSIMMIS Approach to Mediation: Data Models and Languages
Journal of Intelligent Information Systems - Special issue: next generation information technologies and systems
Cost-based query scrambling for initial delays
SIGMOD '98 Proceedings of the 1998 ACM SIGMOD international conference on Management of data
An adaptive query execution system for data integration
SIGMOD '99 Proceedings of the 1999 ACM SIGMOD international conference on Management of data
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Semantic query caching in a mobile environment
ACM SIGMOBILE Mobile Computing and Communications Review
Metadata modeling in a global computing environment
Proceedings of the 10th ACM international symposium on Advances in geographic information systems
Sleepers and workaholics: caching strategies in mobile environments (extended version)
The VLDB Journal — The International Journal on Very Large Data Bases
Partial Answers for Unavailable Data Sources
FQAS '98 Proceedings of the Third International Conference on Flexible Query Answering Systems
Querying in Highly Mobile Distributed Environments
VLDB '92 Proceedings of the 18th International Conference on Very Large Data Bases
Semantic Data Caching and Replacement
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
Querying Heterogeneous Information Sources Using Source Descriptions
VLDB '96 Proceedings of the 22th International Conference on Very Large Data Bases
DBGlobe: a service-oriented P2P system for global computing
ACM SIGMOD Record
Cost efficient broadcast based cache invalidation for mobile environments
Proceedings of the 2003 ACM symposium on Applied computing
A Cache Engine for E-Content Integration
IEEE Internet Computing
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We describe the DAIMON system for data integration of nomadic data. DAIMON is based on an extension of the mediator-wrapper architecture, where each node is a mediator of its own information and information from its neighbouring nodes. We describe the overall architecture, including our lightweight peer location and neighbourhood identification scheme, cache management strategy and query processing and execution architecture, and show how it addresses the challenges of the wireless environment. We introduce connectivity profiles for mobile peers to capture their different connectivity, availability and accessibility patterns, and we describe how they can be used to guide query processing and optimization decisions by the mediator module of the mobile peers. The implementation of the DAIMON system is also discussed.