To support heterogeneity is a major requirement in current approaches to integration and transformation of data. This paper proposes a new approach to the translation of schema and data from one data model to another, and we illustrate its implementation in the tool MIDST-RT. We leverage on our previous work on MIDST, a platform conceived to perform translations in an off-line fashion. In such ...

The volume of information of the most various types stored electronically in a company is increasing to an ever-greater extent. While in the field of operational systems everything is aimed at achieving the quickest possible throughput, in the dispositive field, questions regarding the total overview or detailed views are of interest. OLAP servers are multidimensionally structured. They are the...

Before industry can adopt Multi-Agent System (MAS) critical issues like safety and security must be solved. The first part of this paper introduces an implementation architecture that serves as a framework to discuss the various aspects of MAS safety, and to classify the many heterogeneous approaches in this field. In the second part of the paper we present our own approach to increase MAS safe...

The event calculus is a logic programming formalism for representing events and their effects especially in database applications. This paper proposes the event calculus as a logic-based methodology for the specification and execution of workflows. It is shown that the control flow graph of a workflow specification can be expressed as a set of logical formulas and the event calculus can be used...

In Dung’s abstract argumentation, arguments are either acceptable or unacceptable, given a chosen notion of acceptability. This gives a coarse way to compare arguments. In this paper, we propose a counting approach for a more fine-gained assessment to arguments by counting the number of their respective attackers and defenders based on argument graph and argument game. An argument is more accep...

Several proposals for updating XML have been introduced. Many of them have a rather complicated semantics due to the interaction of side-effects and updates, and some proposals also complicate the semantics of XQuery because arbitrary side-effecting update statements are allowed inside queries. Moreover, static typechecking has not been studied for any proposed XML update language. In this pape...

The common “one size does not fit all” paradigm isolates transactional and analytical workloads into separate, specialized database systems. Operational data is periodically replicated to a data warehouse for analytics. Competitiveness of enterprises today, however, depends on real-time reporting on operational data, necessitating an integration of transactional and analytical processing in a s...

Managing scientiic data is a challenging task, and many of the problems it presents have yet to be adequately solved. The Real-time Environmental Information Network and Analysis System (REINAS) is an attempt to develop an operational solution to the problem of collecting and distributing environmental data in a real-time context, as well as supporting data acquisition, veriication, retrieval, ...

Naming mtDNA sequences by listing only those sites that differ from a reference sequence is the standard practice for describing the observed variations. Consistency in nomenclature is desirable so that all sequences in a database that are concordant with an evidentiary sequence will be found for estimating the rarity of that profile. The operational alignment and nomenclature rules, i.e., "Wil...

VIDEBAS is a relational database management system in which a database consists of two parts, namely a “real-only” and an “update” part. The first part remains unmodified until the next reorganization and exploits redundancy to achieve fast access to data. A prototype of VIDEBAS has been built. In this paper a performance comparison between this relational system and a DBTG-system (UDS) is made...