This book constitutes the refereed proceedings of the Second East European Symposium on Advances in Databases and Information systems, ADBIS '98, held in Poznan, Poland in September 1998.The 25 revised full papers presented were selected from a total of 90 submissions and six extended abstracts within a special section.

Recent progress in data integration — A tutorial.- Managing multimedia information in a database environment — A tutorial.- Association rules... and what’s next? — Towards second generation data mining systems.- Workflow management in the internet age.- Untyped queries, untyped reflective machines and conditional quantifiers.- Containment of conjunctive queries with built-in predicates with variables and constants over any ordered domain.- Using queries with multi-directional functions for numerical database applications.- Multiple range query optimization in spatial databases.- Optimizing command logs by exploiting semantic knowledge.- A distributed algorithm for global query optimization in multidatabase systems.- Transaction management in databases supporting collaborative applications.- Object-oriented design of a flexible workflow management system.- Extending transaction closures by n-ary termination dependencies.- Distributed information systems.- Integrated web — Database applications for electronic business.- Term weighting in query-based document clustering.- Discovery of object-oriented schema and schema conflicts.- On the ordering of rewrite rules.- Towards data and object modelling.- Propagation of structural modifications to an integrated schema.- Integration of schemas containing data versions and time components.- Deriving relationships between integrity constraints for schema comparison.- A database interface integrating a query language for versions.- nP-Tree: Region partitioning and indexing for efficient path planning.- Replication in mirrored disk systems.- Clustering techniques for minimizing object access time.- Designing persistence for real-time distributed object systems.- Partial replication of object-oriented databases.- Optimizingknowledge discovery over the WWW.- Data mining query language for object-oriented database.- Itemset materializing for fast mining of association rules.- Schema derivation for WWW information sources and their integration with databases in Bioinformatics.- Component-based information systems development tool supporting the SYNTHESIS design method.- Translating relational queries to object-oriented queries according to ODMG-93.- A flexible framework for a correct database design.- Human resources information systems improvement: Involving financial systems and other sources data.- Physical structure design for relational databases.- Modeling of census data in a multidimensional environment.