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cs.DB2023
Extremal Fitting CQs do not Generalize
Balder ten Cate, Maurice Funk, Jean Christoph Jung +1
A fitting algorithm for conjunctive queries (CQs) produces, given a set of positively and negatively labeled data examples, a CQ that fits these examples. In general, there may be…
cs.DB2022
Conservative Extensions for Existential Rules
Jean Christoph Jung, Carsten Lutz, Jerzy Marcinkowski
We study the problem to decide, given sets T1,T2 of tuple-generating dependencies (TGDs), also called existential rules, whether T2 is a conservative extension of T1. We consider t…