DOCSLIB.ORG

Web Engineering for Workflow-Based Applications: Models, Systems and Methodologies

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Web Engineering for Workflow-Based Applications: Models, Systems and Methodologies Web Engineering for Workflow-based Applications: Models, Systems and Methodologies zur Erlangung des akademischen Grades eines Doktors der Ingenieurwissenschaften von der Fakultät für Informatik der Universität Fridericiana zu Karlsruhe (TH) genehmigte Dissertation von Patrick Freudenstein aus Ludwigsburg Tag der mündlichen Prüfung: 14.07.2009 Erster Gutachter: Prof. Dr. Wilfried Juling Zweiter Gutachter: Prof. Dr. Hartmut Schmeck Acknowledgements Working towards this thesis, I received manifold support for which I am very grateful and would like to express my appreciation for. First of all, I would like to thank my supervisor Prof. Dr. Wilfried Juling for giving me the great opportunity to join his research group at the Karlsruhe Institute of Technology’s (KIT) Institute of Telematics as well as for leaving me valuable freedom and scope for my research. Furthermore, I would like to thank Prof. Dr. Hartmut Schmeck for his work and assistance as second referee as well as Prof. Dr. Andreas Oberweis and Prof. Dr. Sebastian Abeck for acting as examiners in my disputation. During my time at the KIT, I had the luck to work with excellent and highly motivated colleagues and students in a friendly and inspiring atmosphere, for which I am particularly grateful. I would like to thank my colleagues Jan Buck, Prof. Dr. Martin Gaedke, Frederic Majer, Dr. Johannes Meinecke and Dr. Martin Nußbaumer from the IT Management and Web Engineering Research Group (MWRG) for the numerous stimulating discussions and fruitful joint work. I would also like to thank Ina Dvorak for assisting me with administrative work and for her cheerful way of resolving problems. I am thankful to Martin N. for managing the group’s transition so smoothly as well as for his continuous helpfulness and support, proficient advice and our successful collaboration throughout the years. I am particularly thankful to Frederic who stood by my side throughout all the hard work and made it much more enjoyable. Being my best friend, he has also been a great mentor, always available for discussing questions and a unique source of creativity. Furthermore, I am thankful to my graduate students Florian Allerding, Christoph Augenstein, Marko Böttger, Jan Buck, Thorsten Höllrigl, Kristina Jochim, Leila Karademir, Nikolay Orozov, Frank Schell, Denny Setiawan and Frédéric Wenzel for their high enthusiasm, commitment and valuable contributions to my research. The project ‘Karlsruhe’s Integrated InformationManagement (KIM)’ and the people involved therein presented a central pillar of my work at the KIT. As a dynamic and motivated team, we have succeeded numerous ambitious accomplishments, often beyond the team member’s actual responsibilities. As representatives for the entire team, I would like to thank Jan Buck, Thorsten Höllrigl, Stefan Link, Lei Liu, Frederic Majer, Axel Maurer, Christof Momm, Daniel Ried, Frank Schell, Wilhelm Sievers and vi Acknowledgements Marek Šiller for the great time, the joint efforts and the friendly atmosphere in the KIM Labs. Moreover, I am thankful to all my friends and former colleagues who have supported me in my personal development and encouraged me in my decision to take the path towards doing a PhD. In this regard, I would like to particularly thank Dr. Dietger Bansberg, Dr. Stefan Feyrer and Sabine Schnarrenberger for their great sponsorship, mentoring and deep friendship. Finally, I would like to express my particular gratitude to my parents Jutta and Gerd for conveying me the values and principles which made my path of life and this thesis possible in the first place. They, together with my brother Moritz and my grandparents, have always and unconditionally supported and encouraged me and enriched my life with kindness and happiness. I have special thanks for my grandfather Werner who sparked my interest in programming already in my early childhood and thus laid the foundation for my development as a computer scientist. I learnt so much from him and he will always be a great role model for me. Above all, I would like to thank my fiancée Dana for her unique and unlimited understanding during these intense years. She has always supported and encouraged me and infected me with her happiness. Thank you so much, Dana! Zusammenfassung Workflowbasierte Web Anwendungen stellen eine eigenständige, stark an Bedeu- tung gewinnende Generation von Anwendungen dar, die auf den Technologien und Standards des World Wide Web Consortiums (W3C) aufbauen sowie Dienste und Inhalte über den Browser anbieten. Zu deren Evolution haben primär drei Faktoren beigetragen: Erstens, die weitreichende, durch erfolgreiche Standardisie- rungsbemühungen getriebene Akzeptanz und Etablierung des Konzepts der service- orientierten Architektur (SOA). Zweitens, die unter dem Schlagwort „Web 2.0“ subsummierte neue Generation hochgradig interaktiver Web Anwendungen und Basistechnologien. Drittens, der aus Sicht von Unternehmen dringende Bedarf einer durchgängigen und flexiblen IT-basierten Geschäftsprozessunterstützung über System- und Organisationsgrenzen hinweg. Vor diesem Hintergrund bieten workflowbasierte Web Anwendungen eine homogene, integrative und plattform- unabhängig verfügbare Benutzungsschnittstelle zur effektiven Abwicklung von Geschäftsprozessen. Aus technischer Sicht ergeben sich hierdurch vielfältige Anforderungen, die zur Erzielung einer effizienten und effektiven Entwicklung workflowbasierter Web An- wendungen zu adressieren sind. Dies betrifft insbesondere die Bereiche der Prozess- steuerung und der Benutzungsschnittstelle sowie weitere, aus den spezifischen Cha- rakteristika von Web Anwendungen resultierende Herausforderungen. Hierzu zählen beispielsweise kurze Entwicklungs- und Evolutionszyklen, die zunehmende Bedeu- tung von Ästhetik und Benutzungsfreundlichkeit, die Vielfalt an Zugriffskanälen sowie die ausgeprägte Heterogenität der zukünftigen Nutzer und der an der Ent- wicklung beteiligten Personen (engl. „Stakeholder“). Des Weiteren stellen die Viel- zahl unterschiedlicher Entwicklungs-Artefakte sowie die inhärente Dokumentenzen- triertheit des Web grundlegende Spezifika von Web Anwendungen dar. Neben den genannten Problemstellungen kommt aus einer kommunikations- und kollaborationsorientierten Sichtweise der intensiven und effektiven Einbindung von Stakeholdern eine zentrale Bedeutung zu. In verschiedenen Studien wurde die man- gelhafte Einbindung und Kommunikation mit allen relevanten Personengruppen als einer der Hauptgründe für das Scheitern von Softwareprojekten identifiziert. Dies gilt insbesondere im Kontext workflowbasierter Web Anwendungen, für die eine effek- tive Kommunikation bezüglich der abzubildenden Geschäftsprozesse und Aktivitäten viii Zusammenfassung wesentlich ist. Darüber hinaus kann der dabei relevante Personenkreis entsprechend der Komplexität zu betrachtender Geschäftsprozesse hochgradig heterogen sein. Vor diesem Hintergrund präsentiert die vorliegende Dissertation einen modellgetrie- benen Ansatz zur Konstruktion workflowbasierter Web Anwendungen mit besonde- rem Fokus auf die effiziente und effektive Einbindung von Stakeholdern. Aufbauend auf einer systematischen Analyse der Problemdomäne wurden neuartige Konzepte, Modelle, Systeme und Methodiken entwickelt und evaluiert, die einen wesentlichen Beitrag zum aktuellen Stand der Technik darstellen. Im Einzelnen liefert die Arbeit folgende Beiträge: Web Engineering DSL Rahmenwerk: Als konzeptionelle Grundlage für eine intensi- vere und effektivere Zusammenarbeit mit Stakeholdern bei der Entwicklung von Web Anwendungen wird ein neuartiger modellgetriebener Konstruktionsansatz präsentiert, der auf domänenspezifischen Sprachen (DSLs) fußt. Ziel ist es, Stakeholder in die Lage zu versetzen, eigenständig Teile der Lösung validieren, modifizieren und auch spezifizieren zu können. Das Rahmenwerk sieht die Verwendung verschiedener, stark fokussierter DSLs für die einzelnen Aspekte einer Web Anwendung vor. Dabei erlaubt die DSL-Spezifikation die Integration auf bestimmte Stakeholdergruppen und Prozessphasen zugeschnittener Notationen und Werkzeuge. Dadurch kann deren Erlernbarkeit und Anwendbarkeit sowohl für Entwickler als auch für Stakeholder mit geringen IT-Kenntnissen signifikant verbessert werden. Der vorgestellte Ansatz bietet eine neuartige Alternative zu den existierenden schwergewichtigen und monolithischen Modellierungsansätzen im Web Engineering, die primär für die Verwendung innerhalb von Entwicklerteams entworfen wurden. Web Anwendungen werden somit evolutionär durch Komposition spezifischer Softwarekomponenten und deren Konfiguration durch DSL- Programme in Form von Stakeholder-orientierten Modellen konstruiert und weiterentwickelt. Der „Workflow-DSL“-Ansatz: Eine Anwendung des DSL-Konzepts zur Stakeholder- orientierten und vollständig modellgetriebenen Konstruktion workflowbasierter Web Anwendungen stellt die Workflow DSL dar. Durch den Ansatz wird eine holistische Spezifikation von Workflow-Aspekten und webbasierten Benutzungsschnittstellen für die effiziente und effektive Abwicklung von Workflow-Aufgaben möglich. Das der DSL zugrunde liegende formalisierte Schema stellt eine neuartige, auf weitverbreite- ten Standards und deren nativen Erweiterungsmechanismen basierende, konzeptio- nelle Grundlage zur integrierten Spezifikation dieser Aspekte dar. Die Workflow DSL erlaubt die iterative Modellierung workflowbasierter Web Anwendungen mittels verschiedenster bekannter Notationen und Werkzeuge in Abhängigkeit des Ent- wicklungsfortschritts und der Bedürfnisse der jeweiligen Stakeholdergruppe.
Load more

Recommended publications
  • Extracting the Features of Modern Web Applications Based on Web Engineering Methods
    (IJACSA) International Journal of Advanced Computer Science and Applications, Vol. 10, No. 2, 2019 Extracting the Features of Modern Web Applications based on Web Engineering Methods 1 Karzan Wakil Dayang N.A. Jawawi2 Research Center, Sulaimani Polytechnic University Software Engineering Department Sulaimani 46001, Kurdistan Region, Iraq Faculty of Computing Software Engineering Department, Faculty of Computing Universiti Teknologi Malaysia 81310 Universiti Teknologi Malaysia, Johor, Malaysia Johor Bahru, Johor, Malaysia Abstract—With the revolution of the information, an applications [7], in this paper imported web 5.0 to web 4.0 advanced version of the web proposed from web 1.0 to web 4.0. because of both generations regarded to Artificial Intelligent In each version, many web applications appeared. In the new (AI). Clusters of webs 3.0 and 4.0 represent the MWAs that versions, modern web applications (MWAs) proposed. These possess great extent of complexities, encompassing Ubiquitous applications have specific features and different features, and Web Applications (UWAs), Rich Internet Applications (RIAs), these features made a new challenge for web engineering Semantic Web Applications (SWAs), and Intelligent Web methods. The problem is that web engineering methods have Applications (IWAs). limitations for MWAs, and the gap is that the developers cannot highlight the new features based on web engineering methods. In Model-Driven Web Engineering (MDWE) is deployed this paper, we extract features of the MWA based on web based on the concept of separation of representation models in engineering methods. We extract web application modules for designing web applications, which is advantageous, showing interaction and structure of their feature based on predominantly, as the platforms and technologies employed in models and elements of web engineering methods.
    [Show full text]
  • Web Engineering Syllabus
    BCS LEVEL 6 PROFESSIONAL GRADUATE DIPLOMA IN IT WEB ENGINEERING SYLLABUS August 2021 v1.0 This qualification is regulated by one or more of the following: Ofqual, Qualifications Wales, CCEA Regulation or SQA. CONTENTS 3. Introduction 4. Qualification Suitability and Overview 5. SFIA Levels 6. Learning Outcomes 7. Syllabus 17. Examination Format 17. Question Weighting 18. Recommended Reading 21. Document Change History Introduction Level 6 Professional Graduate Diploma in IT The final stage within the BCS three-stage Higher Education Qualification program, the Level 6 Professional Graduate Diploma (PGD) enables candidates who have already achieved the Level 5 Diploma in IT to gain depth of knowledge and expertise in their field. Our modules have been created in-line with the SFIAPlus framework and latest developments in the industry, giving you a competitive edge in the IT job market and showing your dedication to the industry. You will have the opportunity to learn about topics such as advanced database management, network information systems, web engineering and programming paradigms, as well as to build upon knowledge and skills developed during the Level 5 Diploma. To successfully achieve the qualification, candidates need to complete: • One core module (Professional Project in IT) • Four optional modules Depending on entrance conditions, completing the Level 6 PGD in IT may support entry onto a Master’s degree course at selected global universities. 3 Web Engineering Optional Module The Web Engineering module is an optional module that forms part of the Level 6 PGD in IT – the final stage within the BCS three-stage Higher Education Qualification program.
    [Show full text]
  • Recommendations Using Dbpedia How Your Facebook Profile Can Be Used to Find Your Next Greeting Card
    UNIVERSITY OF TWENTE 2014 / 2015 Recommendations using DBpedia How your Facebook profile can be used to find your next greeting card MASTER THESIS Author: Anne van de Venis Supervisors: Maurice van Keulen Djoerd Hiemstra Victor de Graaff Foppe Strikwerda List of figures Anne van de Venis 2 List of figures Anne van de Venis 3 CONTENTS List of figures .......................................................................................................................................... 5 List of tables ............................................................................................................................................ 6 Abstract ................................................................................................................................................... 7 Introduction ............................................................................................................................................. 9 1.1 Background & Motivation ............................................................................................................. 9 1.2 Problem Statement ...................................................................................................................... 11 1.3 Research Questions ..................................................................................................................... 12 1.4 Proposed System Architecture .................................................................................................... 12 1.5 Contributions ..............................................................................................................................
    [Show full text]
  • WEB ENGINEERING Web Engineering Is the Application Of
    Journal of Web Engineering, Vol. 1, No.1 (2002) 003-017 © Rinton Press WEB ENGINEERING Yogesh Deshpande1, San Murugesan2, Athula Ginige1, Steve Hansen1, Daniel Schwabe3, Martin Gaedke4, Bebo White5 (1) School of Computing and Information Technology, University of Western Sydney Campbelltown Campus, Building 17, Locked Bag 1797 Penrith South DC NSW 1797, Australia Email: {y.deshpande, a.ginige, s.Hansen}@uws.edu.au (2) Southern Cross University, Coffs Harbour Campus, Hogbin Drive, Coffs Harbour, NSW 2457, Australia (3) Departamento de Informática. PUC-Rio, Rio de Janeiro, Brazil Email: [email protected] (4) Institute of Telematics, University of Karlsruhe, Postfach 6980, Zirkel 2, 76128 Karlsruhe Germany Email: [email protected] (5) SLAC, 2575 Sand Hill Road, Menlo Park, CA 90425, USA [email protected] Received September 18, 2002 Revised October 18, 2002 Web Engineering is the application of systematic, disciplined and quantifiable approaches to development, operation, and maintenance of Web-based applications. It is both a pro-active approach and a growing collection of theoretical and empirical research in Web application development. This paper gives an overview of Web Engineering by addressing the questions: a) why is it needed? b) what is its domain of operation? c) how does it help and what should it do to improve Web application development? and d) how should it be incorporated in education and training? The paper discusses the significant differences that exist between Web applications and conventional software, the taxonomy of Web applications, the progress made so far and the research issues and experience of creating a specialisation at the master's level.
    [Show full text]
  • Web Engineering for Semantic Web Applications
    DISSERTATION WEESA - Web Engineering for Semantic Web Applications ausgefuhrt¨ zum Zwecke der Erlangung des akademischen Grades eines Doktors der technischen Wissenschaften unter der Leitung von Univ.-Prof. Dipl.-Ing. Dr.techn. Harald Gall Institut fur¨ Informatik Universitat¨ Zurich¨ und o.Univ.-Prof. Dipl.-Ing. Dr.techn. Mehdi Jazayeri Institut fur¨ Informationssysteme Technische Universitat¨ Wien eingereicht an der Technischen Universitat¨ Wien Fakultat¨ fur¨ Informatik von Univ.-Ass. Dipl.-Ing. Gerald Reif [email protected] Matrikelnummer: 9130640 Wien, im Mai 2005 Kurzfassung Die wachsende Popularitat¨ des World Wide Webs hat zu einer exponentiellen Steigerung der Zahl der Webseiten gefuhrt.¨ Die große Anzahl der verfugbaren¨ Webseiten macht es Benutzern immer schwerer benotigte¨ Informationen zu finden. Sucht man im Web nach einer spezifischen Information, lauft¨ man Gefahr, die relevanten Daten in der großen Anzahl von irrelevanten Su- chergebnissen zu ubersehen.¨ Web-Applikationen stellen derzeit Webseiten in HTML Format zur Verfugung,¨ in denen der Inhalt in naturlicher¨ Sprache ausgedruckt¨ ist. Daher ist die Semantik des Inhalts fur¨ Computer nicht zugangig.¨ Um es Computern zu ermoglichen¨ dem Benutzer bei Informationsproblemen zu unterstutzen,¨ schlagt¨ das Semantik Web eine Erweiterung des exi- stierenden Webs vor, welche die Semantik der Webseiten fur¨ Computer verarbeitbar macht. Die Semantik des Inhalts einer Webseite wird dabei mit RDF Meta-Daten beschrieben. Diese Meta- Daten beschreiben den Inhalt der Webseite in einer maschinen-verarbeitbaren Form. Die Existenz von semantisch annotierten Webseiten ist daher die Voraussetzung fur¨ das Semantik Web. Semantische Annotation beschaftigt¨ sich mit diesem Problem und zielt darauf ab, semanti- sche Meta-Daten zu naturlichsprachigen¨ Dokumenten hinzuzufugen,¨ um den Inhalt maschinen- verarbeitbar zu machen.
    [Show full text]
  • An Introduction to Web Engineering
    An Introduction to Web Engineering Week 1 Syllabus • httpp//://www.csun.edu /~twan g/595WEB /S yllab us Introduction Session • ItIntro duce yourself – Name, majors, expertise, experiences, keywords related to web engineering. Software Project Success Rate Data on 280,000 projects completed in 2000 - Standish Group Data http://www.softwaremag.com/archive/2001feb/CollaborativeMgt.html Definition of Software Engineering • Software Engggineering is defined as the application of science and mathematics by which the capabilities of computer eqqpuipment are made useful to man via computer ppgrograms , pp,rocedures, and associated documentation. A Survey by the Cutter Consortium • The top problem areas of large‐scale Web application projects – Failure to meet business needs (84%) – Project schedule delays (79%) – Budget overrun (63%) – LkLack of filiifunctionalities (53%) – Poor quality of deliverables (52%) Definition of Web Engineering • Web Engggineering is the application of systematic and quantifiable approaches (concepp,ts, methods, techniqq,ues, tools) to cost‐ effective requirements analysis, design, impp,lementation, testing, opp,eration, and maintenance of high‐quality Web applications. Chapter 1: Web-Based Systems • In the early days of the Web, we built systems using informality, urgency, intuition, and art – Informality leads to an easy work environment—one in which you can do your own thing. – Urgency leads to action and rapid decision making. – Intuition is an intangible quality that enables you to “feel” your way through complex
    [Show full text]
  • Web Engineering Security (WES) Methodology William Bradley Glisson University of South Alabama, Mobile, [email protected]
    Communications of the Association for Information Systems Volume 34 Article 71 1-2014 Web Engineering Security (WES) Methodology William Bradley Glisson University of South Alabama, Mobile, [email protected] Ray Welland School of Computing Science University of Glasgow, Glasgow Follow this and additional works at: https://aisel.aisnet.org/cais Recommended Citation Glisson, William Bradley and Welland, Ray (2014) "Web Engineering Security (WES) Methodology," Communications of the Association for Information Systems: Vol. 34 , Article 71. DOI: 10.17705/1CAIS.03471 Available at: https://aisel.aisnet.org/cais/vol34/iss1/71 This material is brought to you by the AIS Journals at AIS Electronic Library (AISeL). It has been accepted for inclusion in Communications of the Association for Information Systems by an authorized administrator of AIS Electronic Library (AISeL). For more information, please contact [email protected]. Web Engineering Security (WES) Methodology William Bradley Glisson School of Computing University of South Alabama, Mobile [email protected] Ray Welland School of Computing Science University of Glasgow, Glasgow The impact of the World Wide Web on basic operational economical components in global information-rich civilizations is significant. The repercussions force organizations to provide justification for security from a business- case perspective and to focus on security from a Web application development environment standpoint. The need for clarity promoted an investigation through the acquisition of empirical evidence from a high level Web survey and a more detailed industry survey to analyze security in the Web application development environment ultimately contributing to the proposal of the Essential Elements (EE) and the Security Criteria for Web Application Development (SCWAD).
    [Show full text]
  • Incorporating Blockchain for Semantic Web Service Selection (SWSS) Method
    Sådhanå Ó (2021) 46:89 Indian Academy of Sciences https://doi.org/10.1007/s12046-021-01619-ySadhana(0123456789().,-volV)FT3](0123456789().,-volV) Incorporating blockchain for semantic web service selection (SWSS) method S SRIDEVI1,*, G R KARPAGAM1 and B VINOTH KUMAR2 1 Department of Computer Science and Engineering, PSG College of Technology, Coimbatore 641 004, India 2 Department of Information Technology, PSG College of Technology, Coimbatore, India e-mail: [email protected]; [email protected]; [email protected] MS received 21 May 2019; revised 13 August 2020; accepted 19 March 2021 Abstract. Customized Quality of Service (QoS) and Quality of Experience (QoE) prediction play an important role in helping users to utilize high-quality service-oriented systems. To obtain accurate prediction results, many approaches have been investigated in recent years. However, these approaches do not fully address trustworthy of QoES (Quality of Service and Experience) values, which is insist on unreliable centralized prediction frameworks, that leading to an imprecise selection of web service. To address this issue, inspired by blockchain with distributed ledger technology, distributed consensus mechanisms, trusted environment, etc., we propose an extended Personalized and Generalized fuzzy TOPSIS approach for QoES prediction over ethereum blockchain to remove unreliable services. Then, the Blockchain-based extended fuzzy TOPSIS approach is employed to evaluate the proposed approach on real-world web services datasets. Experimental results show that the proposed method significantly outperforms existing approaches, making it much more effective than con- ventional techniques. Keywords. Web services; quality of service; quality of experience; quality of selection; QoES prediction; blockchain; extended fuzzy TOPSIS; personalized and generalized factors.
    [Show full text]
  • Developing a Web Enabled Database System: an Academic Project
    Session 1658 Developing a Web-Enabled Database System: An Academic Project Paul I-Hai Lin - Indiana University-Purdue University Fort Wayne Melissa Lin - University of Florida Aik Mon - GE Industrial Systems ABSTRACT Database and Web integration offers a cost effective way to provide value added access to data stored at multiple locations through a Web browser. This paper discusses two methodologies for implementing a remote database query systems using Web browsers. I. Introduction In May 2000, we developed a Web-enabled alumni database for remote access by our faculty and staff. The alumni database was created from a spread sheet that contains the following fields: Title, Last Name, First Name, Middle Initial, Degree Received, Major, Graduation Date, Address, City, State, Zip code, Email address, Phone, Employer, ID, Last Gift Amount, Last Gift date, and Total Gift Amount. The developed Web-based alumni database has the following capabilities: • View data records for all alumni (20 records per screen) • Find a specific alumnus or group of alumni by their Last Name, First Name, Graduation Date, City, State, or Employer • Update specific fields on alumni data records • Update, delete, and add alumni records to database Although the data warehouse and Web-enabled databases are well known and matured in commercial sector, for us, this is a new challenging and requires additional research. This paper is not intended to provide a comprehensive study report of tools and architectures for building database and Web integration systems. However, the Internet protocols, languages and tools, databases, Web servers, CGI, and server-side scripting are highlighted in various sections to help the selections of programming tools, system platform, Web servers, and databases for this Web- enabled alumni database system.
    [Show full text]
  • A Semantic Web Engineering Model
    A Semantic Web Engineering Model Sandeep Kumar, Satyaveer Sangwan, Kuldeep Kumar, Ankita Jain models. The paper has been concluded in Section-6. Abstract —Web Engineering provides the systematic approach to the development of web applications. The Semantic Web is the II. WEB AND SEMANTIC WEB extension of current Web and further the Semantic Web applications can be considered as the augmentation of web applications with The current web can be characterized as the second web ontological annotations. But, the efficient, reliable and systematic generation. It was meant for direct human processing. The development of semantic web based systems cannot be performed third generation web, which one could call the semantic web, using existing web engineering models only. The engineering and aims at machine process able information. Semantic web may systematic approach for the development of semantic web be compared with current web as shown in Table I. applications can be called as semantic web engineering. In this paper, the work has been done to propose a life cycle model for the TABLE I systematic development of semantic web applications. The CHARACTERISTICS DIFFERENTIATING SEMANTIC WEB FROM CURRENT WEB implementation and validation corresponding to the proposed model Current Web Semantic Web has also been performed. Current web content are machine- Semantic web content are Keywords —Ontology, Semantic Web, Semantic Web readable but not machine machine-readable and machine Engineering, Web Engineering understandable. understandable [1]. Current web is just like a book, Data is given well-defined I. INTRODUCTION having multiple hyperlinked meaning, understandable by HE document semantic web is an evolving development of documents.
    [Show full text]
  • Lookup, Explore, Discover: How Dbpedia Can Improve Your Web Search
    Undefined 0 (2010) 1{0 1 IOS Press Lookup, Explore, Discover: how DBpedia can improve your Web search Roberto Mirizzi a, Azzurra Ragone a Tommaso Di Noia a and Eugenio Di Sciascio a a Politecnico di Bari, via Re David 200, 7015, Bari { Italy E-mail: [email protected], [email protected], [email protected], [email protected] Abstract. The power of search is with no doubt one of the main aspects for the success of the Web. Differently from traditional searches in a library, search engines for digital libraries (as the Web is) allow to return results that are considerably effective. Nevertheless, current search engines are no more able to really help the user in all those tasks that go under the umbrella of exploratory search, where the user needs not only to perform a lookup operation but also to discover, understand and learn novel contents on complex topics while searching. Similar problems arise also with search exploiting classical keyword-based tagging techniques. In the paper we present LED, a web based system that aims to improve Web search by enabling users to properly explore knowledge associated to a query/keyword. We rely on DBpedia to explore the semantics of keywords and to guide the user during the exploration of search results. 1. Introduction happens when the user has not a clear idea of what she is looking for and (possibly) she needs some Thanks to the social paradigm of the Web 2.0 suggestions in the exploration process. The above new tools and technologies emerged to allow the mentioned tools enrich the page of search results user to interact with on-line resources.
    [Show full text]
  • Web Engineering Education: an Evolutionary Perspective
    Journal of Information Technology Education Volume 4, 2005 Designing a Pedagogical Model for Web Engineering Education: An Evolutionary Perspective Said Hadjerrouit Agder University College, Kristiansand, Norway [email protected] Executive Summary In contrast to software engineering, which relies on relatively well established development ap- proaches, there is a lack of a proven methodology that guides Web engineers in building reliable and effective Web-based systems. Currently, Web engineering lacks process models, architec- tures, suitable techniques and methods, quality assurance, and a systematic approach to the devel- opment process. As a result, Web engineering is still struggling to establish itself as a reliable engineering discipline. The cost of poor reliability and effectiveness has serious consequences for the acceptability of the systems. One of the main reasons for the low acceptance of Web-based applications is the large gap between design models and the implementation model of the Web. It is therefore not surprising that Web engineering education still focuses on technologies, rather than on critical skills that facilitate engineers to solve real-world problems effectively. To meet the challenges of Web engineering, current education must be aligned with a pedagogical model capable of empowering and supporting the acquisition of critical skills. To do this, a new learn- ing environment must be created that promotes change in both pedagogy and course material, in effect, altering the role of the teacher, the expectations for students, and many other educational aspects. This article describes a learner-centered pedagogical model rooted in the constructivist learning theory for teaching students the skills they need to construct Web-based applications more effectively and collaboratively.
    [Show full text]