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An Epistemic Operator for Description Logics., , , , and . Artif. Intell., 100 (1-2): 225-274 (1998)Algorithms for Rewriting Aggregate Queries Using Views, , and . CoRR, (2000)Republishers in a Publish/Subscribe Architecture for Data Streams., and . BNCOD, volume 3567 of Lecture Notes in Computer Science, page 179-184. Springer, (2005)Sources of Incompleteness in Grid Publishing., , and . BNCOD, volume 4042 of Lecture Notes in Computer Science, page 94-101. Springer, (2006)A Data Stream Publish/Subscribe Architecture with Self-adapting Queries., and . OTM Conferences (1), volume 3760 of Lecture Notes in Computer Science, page 420-438. Springer, (2005)NEWS: News Event Walker and Summarizer., , and . SIGMOD Conference, page 1973-1976. ACM, (2019)Aggregate queries over ontologies., , , and . ONISW, page 97-104. ACM, (2008)Tractable Concept Languages., , , and . IJCAI, page 458-465. Morgan Kaufmann, (1991)Answering queries over incomplete data stream histories., , and . Int. J. Web Inf. Syst., 3 (1/2): 41-60 (2007)Rewriting queries with arbitrary aggregation functions using views., , and . ACM Trans. Database Syst., 31 (2): 672-715 (2006)