Software AG’s Tamino is a novel database server designed to fit the needs of electronic business and worldwide information exchange via the Internet. It is not just an on-top solution based on a database system originally designed for use in other application areas. Rather, it is entirely designed for the specific scenario of HTTP-based access to data represented in XML. These data can stem fro...

This paper describes the LDL++ system and the research advances that have enabled its design and development. We begin by discussing the new nonmonotonic and nondeterministic constructs that extend the functionality of the LDL++ language, while preserving its model-theoretic and fixpoint semantics. Then, we describe the execution model and the open architecture designed to support these new con...

This chapter proposes the use of the type abstraction hierarchy (TAH) as a framework for deriving cooperative query answers (CQA). The TAH integrates abstraction with the subsumption (is-a) and composition (part-of) semantics found in the type hierarchy. This framework provides a multi-level object representation that is an important aspect of cooperative query answering. Patterns, which specif...

We demonstrate our prototype of the DBO database system. DBO is designed to facilitate scalable analytic processing over large data archives. DBO’s analytic processing performance is competitive with other database systems; however, unlike any other existing research or industrial system, DBO maintains a statistically meaningful guess to the final answer to a query from start to finish during q...

We develop a Web-based video database management system, named BilVideo, providing an integrated support for both spatio-temporal and semantic (keyword, event/activity and category-based) queries on video data. In this paper, we introduce the architecture of BilVideo and its SQL-like textual video query language that has the capability to handle a broad range of spatio-temporal queries, which m...

Problem of knowledge analysis for decision support system is the most difficult task of information systems. This paper presents a new approach based on notions of mathematical theory of Rough Sets to solve this problem. Using these concepts a systematic approach has been developed to reduce the size of decision database and extract reduced rules set from vague and uncertain data. The method ha...

A parallel database management system (DBMS) called Kappa is developed in order to provide e cient database management facilities for knowledge information processing applications. The data model of Kappa is based on a nested relational model to treat complex structured data e ciently. The system is written in KL1, and works on parallel and/or distributed environments of conventional machines w...

We describe the MyYapDB, a deductive database system coupling the Yap Prolog compiler and the MySQL DBMS. We use our OPTYap extension of the Yap compiler, which is the first available system that can exploit parallelism from tabled logic programs. We describe the major features of the system, give a simplified description of the implementation and present a performance comparison of using stati...

The article describes an airport database management system , which is a part of large simulation environment developed under the ESPRIT project SEEDS. Airport management database is a distributed computing system written entirely in Java and connected to the rest of the SEEDS system through CORBA interface. The majority of the SEEDS modules is written in C++ and communicates through CORBA. The...

This work describes a novel implementation of a deductive database system which fills some gaps other systems do not. In fact, this system was born to this end and since its inception, many new features have been added (null values, outer joins, aggregates, ...). In particular, it embodies both Datalog and SQL query languages, where the same database can be queried. It enjoys an actual interact...