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On preservation under homomorphisms and unions of conjunctive queries., , and . J. ACM, 53 (2): 208-237 (2006)The Decision Problem for the Probabilities of Higher-Order Properties, and . STOC, page 425-435. ACM, (1987)A Declarative Framework for Linking Entities., , , , and . ICDT, volume 31 of LIPIcs, page 25-43. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, (2015)Dependence Logic vs. Constraint Satisfaction., and . CSL, volume 62 of LIPIcs, page 14:1-14:17. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, (2016)Schema Mappings and Data Examples: Deriving Syntax from Semantics (Invited Talk).. FSTTCS, volume 13 of LIPIcs, page 25-25. Schloss Dagstuhl - Leibniz-Zentrum für Informatik, (2011)On the tractability and intractability of consistent conjunctive query answering., , and . EDBT/ICDT Ph.D. Workshop, page 38-44. ACM, (2011)Structural characterizations of schema-mapping languages., and . Commun. ACM, 53 (1): 101-110 (2010)A Declarative Framework for Linking Entities., , , , and . ACM Trans. Database Syst., 41 (3): 17:1-17:38 (2016)Quasi-inverses of schema mappings., , , and . ACM Trans. Database Syst., 33 (2): 11:1-11:52 (2008)Generalized Satisfiability Problems via Operator Assignments., , and . FCT, volume 10472 of Lecture Notes in Computer Science, page 56-68. Springer, (2017)