This volume presents the refereed proceedings of the East-European Conference on Advances in Databases and Information Systems and of the International Conference on Database Systems for Advanced Applications, ADBIS-DASFAA 2000, held jointly in Prague, Czech Republic in September 2000.The 27 revised papers presented together with one invited paper and the abstract of an invited talk were carefully reviewed and selected from 115 submissions. The papers present new results on a variety of current issues in database research and design with a certain emphasis on advanced applications in various fields.

Advances in Database Technologies(ADT) is a workshopseries designed to p- mote interaction and discussion among researchers and practitioners in speci?c topics related to advanced data modeling and database technologies. The ?rst ADT workshop was held in conjunction with the 17th International Conference on Conceptual Modeling (ER'98) in Singapore. It consisted of three small wo- shops, i.e., the"InternationalWorkshoponDataWarehousingandDataMining" organized by Prof. Sham Navathe and Dr. Mukesh Mohania, the "International Workshop on Mobile Data Access" organized by Prof. Dik Lun Lee, and the "InternationalWorkshopon New DatabaseTechnologiesfor CollaborativeWork Support and Spatio-TemporalData Management" organizedby Prof.Yoshifumi Masunaga. These three small workshops were held simultaneously on 19 and 20 November, and the papers were jointly published in this ADT'98 proceedings. Wewouldliketo thankProf.ShamNavathe, Dr. MukeshMohania, Prof.Dik Lun Lee, Prof. Yoshifumi Masunaga and their program committees for wo- ing together to insure an excellent workshop program. The program co-chair of ER'98 Prof. Tok Wang Ling and his organizing committee members gave o- standing support to the workshops with the local arrangements, registration, publicity, and the preparationof the proceedings. Our special thanks go to Prof.

This book constitutes the refereed proceedings of the Second International Conference on Worldwide Computing and Its Applications, WWCA'98, held in Tsukuba, Japan, in March 1998.
This volume presents 14 invited and survey papers together with 20 papers selected by the conference committee. The volume is divided into topical sections on distributed objects, distributed componentware, distributed systems platforms, Internet technology, mobile computing, interculture technology, collaborative media, collaborative support, information discovery and retrieval, novel network applications.

This book constitutes the strictly refereed post-conference proceedings of the International Conference on Worldwide Computing and Its Applications, WWCA'97, held in Tsukuba, Japan, in March 1997.
The volume presents 15 revised full papers selected from 50 submissions as well as 15 revised invited papers by leading researchers in this emerging area and two keynotes. The papers are organized in topical sections on distributed programming languages and systems, distributed object environments, cooperative computation, collaboration support Systems, collaborative media, novel distributed applications, Internet and protocols, distributed system platforms, mobile computing, and application gateways.

This volume is the proceedings of the Second International Conference on Deductive and Object-Oriented Databases (DOOD). During the last decade, deductive and object-oriented systems have received a great deal of attention, but for the most part these two fields were evolving independently of each other. Today there is a large body of work suggesting that the deductive and object-oriented paradigms complement each other. The object-oriented paradigm is characterized by its view of the data, whereby information is grouped around objects with complex internal structure accessed via methods. The declarative paradigm is centered around the idea that data manipulation must be done through a declarative, logic-based language. It is hoped that these two aspects, brought together in one system, will provide an integrated framework fora new database technology. The DOOD conference brings together researchers and developers in the fields of deductive and object-oriented databases to stimulate technical discussion and accelerate the integration of the two technologies. This volume contains 28 contributed papers (selected from 98 submissions) and two invited papers by world-renowned researchers.