Complexity of answering queries using materialized views
PODS '98 Proceedings of the seventeenth ACM SIGACT-SIGMOD-SIGART symposium on Principles of database systems
Navigational plans for data integration
AAAI '99/IAAI '99 Proceedings of the sixteenth national conference on Artificial intelligence and the eleventh Innovative applications of artificial intelligence conference innovative applications of artificial intelligence
The Clio project: managing heterogeneity
ACM SIGMOD Record
Data integration: a theoretical perspective
Proceedings of the twenty-first ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Foundations of Databases: The Logical Level
Foundations of Databases: The Logical Level
Introduction to logic-based artificial intelligence
Logic-based artificial intelligence
Information Integration Using Logical Views
ICDT '97 Proceedings of the 6th International Conference on Database Theory
Reformulation of XML Queries and Constraints
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Data Exchange: Semantics and Query Answering
ICDT '03 Proceedings of the 9th International Conference on Database Theory
Data Integration under Integrity Constraints
CAiSE '02 Proceedings of the 14th International Conference on Advanced Information Systems Engineering
Query Rewriting with Symmetric Constraints
FoIKS '02 Proceedings of the Second International Symposium on Foundations of Information and Knowledge Systems
Physical Data Independence, Constraints, and Optimization with Universal Plans
VLDB '99 Proceedings of the 25th International Conference on Very Large Data Bases
Data exchange: getting to the core
Proceedings of the twenty-second ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
On the decidability and complexity of query answering over inconsistent and incomplete databases
Proceedings of the twenty-second ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems
Query containment for data integration systems
Journal of Computer and System Sciences - Special issue on PODS 2000
The Piazza Peer Data Management System
IEEE Transactions on Knowledge and Data Engineering
Constraint-based XML query rewriting for data integration
SIGMOD '04 Proceedings of the 2004 ACM SIGMOD international conference on Management of data
XML Queries and constraints, containment and reformulation
Theoretical Computer Science - Database theory
Rewriting queries using views with access patterns under integrity constraints
ICDT'05 Proceedings of the 10th international conference on Database Theory
Interactive source registration in community-oriented information integration
Proceedings of the VLDB Endowment
Scalability of Source Identification in Data Integration Systems
Advanced Internet Based Systems and Applications
Bounded regular path queries in view-based data integration
Information Processing Letters
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Owners of sources registered in an information integration system, which provides answers to a (potentially evolving) set of client queries, need to know their contribution to the query results. We study the problem of deciding, given a client query Q and a source registration R, whether R is (i) "self-sufficient" (can contribute to the result of Q even if it is the only source in the system) or (ii) "now complementary" (can contribute, but only in cooperation with other specific existing sources), or (iii)"later complementary" (can contribute if in the future appropriate new sources join the system). We consider open-world integration systems in which registrations are expressed using source-to-target constraints, and queries are answered under "certain answer" semantics.