This text constitutes the post-workshop proceedings of the International Workshop on Logic in Databases, LID '96, held in San Miniato, Italy, in July 1996, the final meeting of an EC-US co-operative activity. The volume presents 21 revised full papers selected from 49 of a panel discussion.

Logic and databases: A 20 year retrospective.- A parametric approach to deductive databases with uncertainty.- A deductive database approach to planning in uncertain environments.- Termination properties of spatial Datalog programs.- Applying transition rules to bitemporal deductive databases for integrity constraint checking.- Towards a unified agent architecture that combines rationality with reactivity.- Learning query rules for optimizing databases with update rules.- Formal characterization of active databases.- Nested transactions in a logical language for active rules.- Deductive Databases: Challenges, opportunities and future directions.- R-stable models for logic programs.- The expressive power of partial models for disjunctive deductive databases.- Stable model checking for disjunctive logic programs.- Analysis of logic-based systems.- An axiomatic interpretation of confidentiality demands in logic-based relational databases.- Database query evaluation with the STARBASE method.- The limits of fixed-order computation.- The $$\mathcal{I}\mathcal{Q}$$ system: A deductive database Information Lens for reasoning about textual information.- Arithmetic and aggregate operators in deductive object-oriented databases.- Sequence Datalog: Declarative string manipulation in databases.- Language extensions for semantic integration of deductive databases.- Unification of bounded simple set terms in deductive databases.- Expressiveness of semipositive logic programs with value invention.- A more expressive deterministic query language with efficient symmetry-based choice construct.