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Analyzing and Defining Active Database Rules on a Conceptual Level
Karlstad University, Faculty of Economic Sciences, Communication and IT, Avdelningen för informatik och projektledning.
Karlstad University, Faculty of Economic Sciences, Communication and IT.
2009 (English)In: Proceedings of the Eight International Balric Conterence on Databases and Information Systems, Haav, 2009, 361-372 p.Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
2009. 361-372 p.
National Category
Computer and Information Science
Research subject
Information Systems
Identifiers
URN: urn:nbn:se:kau:diva-5014OAI: oai:DiVA.org:kau-5014DiVA: diva2:280056
Available from: 2009-12-08 Created: 2009-12-08 Last updated: 2011-10-05Bibliographically approved
In thesis
1. Component-Oriented Software System Architectures
Open this publication in new window or tab >>Component-Oriented Software System Architectures
2009 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

When designing and developing software systems, there are several challenges that have to be addressed such as complexity, change management and system integrity. Trends in development processes, programming languages and software design are constantly changing. New programming paradigms have succeeded each other while the software systems have grown larger and more difficult to maintain. Component-oriented thinking provides the opportunity to re-use pre-fabricated parts to assemble software systems from tested building blocks, facilitating a rapid and consistent software development process. A component-oriented approach, however, affects both the life cycle and the development process of a software system. Therefore, a new way of viewing the life cycle as well as the development process for component-based software systems is presented in this thesis.

A key issue when using a component-oriented approach is to consider both behavioral and static aspects of a software system. Furthermore, we need to be able to analyze the architecture of the enterprise as well as the software system architecture to deliver business value with information systems. System interdependencies will be placed in the foreground when integrating technical and organizational aspects of the information system. We therefore need a modeling technique suitable for focusing on semantic aspects rather than implementation-dependent issues. A suitable modeling technique is the Enterprise Modeling approach.

This thesis will present a component-oriented approach to software system architectures using the Enterprise Modeling approach.

Place, publisher, year, edition, pages
Karlstad: Karlstad University, 2009. 83 p.
Series
Karlstad University Studies, ISSN 1403-8099 ; 2009:44
Keyword
Software Architecture, Software Component, Enterprise Modeling, Software Development, Software Life Cycle, Development Process, System Architecture
National Category
Other Computer and Information Science
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-4699 (URN)978-91-7063-267-9 (ISBN)
Public defence
2009-11-06, 21A 342 Eva Erikssonsalen, Karlstads universitet, 13:15 (Swedish)
Opponent
Supervisors
Available from: 2009-12-08 Created: 2009-09-21 Last updated: 2011-10-26Bibliographically approved
2. Schema Integration: How to Integrate Static and Dynamic Database Schemata
Open this publication in new window or tab >>Schema Integration: How to Integrate Static and Dynamic Database Schemata
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Schema integration is the task of integrating several local schemata into one global database schema. It is a complex, error-prone and time consuming task. Problems arise in recognizing and resolving problems, such as differences and similarities, between two schemata. Problems also arise in integrating static and dynamic schemata. In this thesis, three research topics are addressed: Maintaining Vocabulary in Schema Integration, Integration of Static Schemata and Integration of Static and Dynamic Schemata, while applying the notation in the Enterprise Modeling approach.

In Maintaining Vocabulary in Schema Integration an analysis of what semantic loss is and why it occurs in schema integration is conducted. Semantic loss is a problem that should be avoided because both concepts and dependencies might be lost. In the thesis, it is argued that concepts and dependencies should be retained as long as possible in the schemata. This should facilitate user involvement since the users’ vocabulary is retained even after resolving similarities and differences between two schemata.

In Integration of Static Schemata two methods are developed. These methods facilitate recognition and resolution of similarities and differences between two conceptual database schemata.  By applying the first method, problems between two schemata can be recognized that otherwise could pass unnoticed; by applying the second method, problems can be resolved without causing semantic loss by retaining concepts and dependencies in the schemata.

In Integration of Static and Dynamic Schemata a method on how to integrate static and dynamic schemata is developed. In the method, focus is put on pre- and post-conditions and how to map these to states and state changes in the database. By applying the method, states that are important for the database can be designed and integrated into the conceptual database schema. Also, by applying the method, active database rules can be designed and integrated into the conceptual database schema.

Place, publisher, year, edition, pages
Karlstad: Karlstads universitet, 2010. 346 p.
Series
Karlstad University Studies, ISSN 1403-8099 ; 2010:13
Keyword
Schema Integration, Conceptual Database Design, Database Schemata, Enterprise Modeling
National Category
Computer and Information Science
Research subject
Information Systems
Identifiers
urn:nbn:se:kau:diva-5541 (URN)978-91-7063-299-0  (ISBN)
Public defence
2010-05-28, Frödingsalen 1B 364, Karlstads universitet, Karlstad, 13:15 (English)
Opponent
Supervisors
Available from: 2010-05-06 Created: 2010-04-09 Last updated: 2011-10-05Bibliographically approved

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Bellström, PeterJakobsson, Lars

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