Selective refutation of integrity constraints in deductive databases -- Approaches to updates over weak instances -- Index selection in relational databases -- Towards a schema design methodology for deductive databases -- Shared abstract data types: An algebraic methodology for their specification -- Specifying closed world assumptions for logic databases -- Interaction of authorities and acquaintances in the DORIS privacy model of data -- Logical rewritings for improving the evaluation of quantified queries -- Mathematical foundations of semantic networks theory -- Functional dependencies and the semilattice of closed classes -- An extended view on data base conceptual design -- Modeling planning problems -- On the interaction between transitive closure and functional dependencies -- A strategy for executing complex queries -- Multiple task selection protocol in a distributed problem solving network -- Equivalent schemes in semantic, nested relational, and relational database models -- Covers for functional independencies -- Restructuring and dependencies in databases -- RTL a Relation and Table Language for statistical databases -- Integration of functions in the fixpoint semantics of rule-based systems -- Locking policies and predeclared transactions -- Means for management of relational fuzzy data bases - Way to merging of systems of data bases and knowledge bases -- A specification language for static, dynamic and deontic integrity constraints -- Blocks and projections' synthesis in relational databases -- The higher-order entity-relationship model and (DB) -- Goal-oriented concurrency control -- Transitive closure and the LOGA+-strategy for its efficient evaluation.