Query rewriting and answering under constraints in data integration systems Export

@inproceedings{citeulike:1891590, abstract = {In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global integration schema. In the case of sound views, we provide sound and complete rewriting techniques for a maximal class of constraints for which decidability holds. Then, we introduce a semantics which is able to cope with violations of constraints, and present a sound and complete rewriting technique for the same dec idable class of constraints. Finally, we consider the decision problem of query answering and give decidability and complexity results.}, author = {Cal\`{\i}, Andrea and Lembo, Domenico and Rosati, Riccardo}, booktitle = {International Joint Conference on Artificial Intelligence}, citeulike-article-id = {1891590}, citeulike-linkout-0 = {http://dli.iiit.ac.in/ijcai/IJCAI-2003/PDF/003.pdf}, keywords = {data\_integration, databases, reading\_list}, pages = {16--21}, posted-at = {2007-11-09 23:27:15}, priority = {5}, title = {Query rewriting and answering under constraints in data integration systems}, url = {http://dli.iiit.ac.in/ijcai/IJCAI-2003/PDF/003.pdf}, year = {2003} }

TY - CONF ID - citeulike:1891590 L3 - citeulike-article-id:1891590 N2 - In this paper we address the problem of query answering and rewriting in global-as-view data integration systems, when key and inclusion dependencies are expressed on the global integration schema. In the case of sound views, we provide sound and complete rewriting techniques for a maximal class of constraints for which decidability holds. Then, we introduce a semantics which is able to cope with violations of constraints, and present a sound and complete rewriting technique for the same dec idable class of constraints. Finally, we consider the decision problem of query answering and give decidability and complexity results. EP - 21 TI - Query rewriting and answering under constraints in data integration systems T2 - International Joint Conference on Artificial Intelligence SP - 16 KW - data_integration KW - databases KW - reading_list AU - Calì, Andrea AU - Lembo, Domenico AU - Rosati, Riccardo PY - 2003/// UR - http://dli.iiit.ac.in/ijcai/IJCAI-2003/PDF/003.pdf ER -