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JWSR, Volume 4, Number 3, July-September 2007
Official Publication of the Information Resources Management Association
Published: Quarterly in Print and Electronically
ISSN: 1545-7362
EISSN: 1546-5004
RESEARCH PAPERS
PAPER ONE:
“Behaviour-Aware Discovery of Web Service Compositions”
Brogi, Antonio; Corfini, Sara
A major challenge for service-oriented computing is how to discover and compose (Web) services to build complex applications. We present a matchmaking system that exploits both semantics and behavioural information to discover service compositions capable of satisfying a client request.
To obtain a copy of the entire article, click on the link below.
http://www.igi-global.com/articles/details.asp?ID=7355
PAPER TWO:
“Service Class Driven Dynamic Data Source Discovery with DynaBot”
Rocco, Daniel; Caverlee, James; Liu, Ling; Critchlow, Terence
Dynamic Web data sources on the Deep Web provide intuitive access to real-time information and large data repositories anywhere that Web access is available. Although recent studies suggest that the dynamic Web is larger and growing faster than static Web, dynamic content is often ignored by existing search engine indexers owing to technical challenges inherent in searching dynamic sources. To address these challenges, we present DynaBot, a service-centric crawler for discovering and clustering Deep Web sources. Dyna- Bot has three unique characteristics. First, DynaBot utilizes a service class model implemented through the construction of service class descriptions (SCDs). Second, DynaBot employs a modular architecture for focused crawling of the Deep Web. Third, DynaBot incorporates algorithms for efficiently probing, discovering, and clustering Deep Web sources through SCD-based service analysis. Experimental results demonstrate DynaBot's effectiveness and suggest techniques for efficiently managing service discovery given the immense scale of the Deep Web.
To obtain a copy of the entire article, click on the link below.
http://www.igi-global.com/articles/details.asp?ID=7356
PAPER THREE:
“Web Service versus Distributed Objects: A Case Study of Performance and Interface Design”
Cook, William R.; Barfield, Janel
Web services are promoted as a new model for distributed systems, yet many skeptics see them as simply a poor implementation of traditional remote procedure calls (RPC) or distributed objects. Previous comparisons, which show Web services to be significantly slower than RPC, are biased because they use a RPC communication style and ignore the document-oriented style that is recommended for Web services. We compare the straightforward design and implementation of a small file server application implemented using proxy-based RMI and document-oriented Web services. We show that Web services outperform RMI when accessing multiple/deeply nested files, especially over high-latency networks. However, the automatically generated Web service interfaces are awkward to use, so we develop a technique for wrapping the Web service to make it as easy to use as the distributed object implementation. This case study provides a more detailed comparison of the relationship between Web services and distributed objects.
To obtain a copy of the entire article, click on the link below.
http://www.igi-global.com/articles/details.asp?ID=7357
PAPER FOUR:
“Dealing with Scale and Adaptation of Global Web Services Management”
Vambenepe, William; Thompson, Carol; Talwar, Vanish; Rafaeli, Sandro; Murray, Bryan; Milojicic, Dejan; Iyer, Subu; Farkas, Keith I.; Arlitt, Martin
Service Oriented Architectures (SOA) are becoming the prevalent approach for realizing modern services and systems. SOA offers superior support for autonomy (decoupling) and heterogeneity compared to previous generation middleware systems, resulting in more scalable and adaptive solutions. However, SOA have not adequately addressed management, while traditional management solutions do not sufficiently scale to address the needs of (global) Web services. We propose scalable management based on models and industry standards. We discuss a use case for global service management and present its design, implementation, and preliminary evaluation. We retain all the benefits of SOA while also enabling global scale manageability. Our approach provides manageability that is comprehensible for administrators yet automated enough for integration into autonomous systems.
To obtain a copy of the entire article, click on the link below.
http://www.igi-global.com/articles/details.asp?ID=7358
PAPER FIVE:
"Fully Automated Web Services Discovery and Composition Through Concept Covering and Concept Abduction"
Ragone, Azzurra; Di Noia, Tommaso; Di Sciascio, Eugenio; Donini, Francesco M.; Colucci, Simona; Colasuonno, Francesco
We propose a framework and tractable algorithms for semantic-based automated Web service composition, fully compliant with Semantic Web technologies. The approach exploits the recently proposed Concept Abduction inference service in Description Logics to extend Concept covering definition to expressive logics, and to solve Concept Covering problems in a significant subset of OWL-DL. We show how the proposed approach also deals with not-exact solutions, computing an approximate composition and providing an explanation of which part of the request is not covered by the composite service. We present the formalization of the approach, the proposed algorithms, a prototype system implementing the approach, and illustrate experiments carried out with it.
To obtain a copy of the entire article, click on the link below.
http://www.igi-global.com/articles/details.asp?ID=7359
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For full copies of the above articles, check for this issue of the International Journal of Web Services Research (JWSR) in your Institution's library.
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