WSDATool: A Novel Web Service Developer Assistance Tool Using a New Complementary Service Publishing Method

Empower service directories with knowledge

Web services technologies change the software industry drastically by developing and integrating enterprise web services and applications in order to enable the users to access them. There are several research initiatives in the field of Web services for enterprise applications. However, none of the initiatives have attempted for web applications pertaining to academic institution using Web services technology. Web service composition is the combination of web services from different service providers to create a more sophisticated, value added web service to the web users. Researchers put on efforts to bring out the state-of-the art in web services technologies and security technologies for web services. The composition of web services is another promising area for research and development. A study reveals that there are number of approaches providing secure web services. However, there is no attempt made so far to secure the services at multi-level. This paper proposes a Multi-level Secured Framework (MLSF) for the students, faculty and employees of the academic institutions which provides secured composite web services such as admission service, fees payment service, library service, personalized service and so on. The MLSF enhances the security at various levels such as user level, device level, web services level and institution level.

Web service technologies are becoming increasingly important for integrating systems and services. There is much activity and interest around standardization and usage of Web service technologies. Contemporary Web services are described in the Web Service Description Language (WSDL). However, WSDL documents can be difficult to understand for service developers. This article recommends a model-driven process for Web service development combining the graphical modeling language UML with WSDL. The Unified Modeling Language (UML) is developed by Object Management Group. In the proposed process, Web service descriptions (in WDSL) are converted to UML; their UML models are integrated to form composite Web services; and then the new Web service descriptions are exported. The main contribution of this article is a “pure UML” modeling strategy supported by implementation of two-way conversion rules between the UML models and the WSDL documents.

Nowadays, with the advancement in mobile technologies, the use of web services has seen an explosion in interest for mobile computing environment. However, the heavyweight nature of conventional web services to be deployed on mobile devices brings new challenges in mobile computing in the coming future. Web services technology and mobile computing domains are converging at their intersection which leads to Mobile Web Services (MWS) which enables the service access in users’ mobile device. As the numbers of web services are increasing dramatically, the web service discovery becomes more important to discover the usable web services in effective and efficient manner. This paper discusses an overview of mobile challenges in MWS recent research, and a summary of the issues. Moreover, current approaches of Mobile Web Services Discovery are classified and these approaches are compared to some criteria. The results of this study will help researchers to deliver more applicable solutions with the most appropriate approaches for Mobile Web Services Discovery.KeywordsWeb ServicesMobile Web Serviceweb service discoverymobile computingmobile web service discovery

The new technology of Web services is beginning to impact the global business approaches and trends in which the services are being offered and consumed. The advancement of Web services and its wide spread use require that its quality of service (QoS) components to be highly dependable and robust. It is clear that one of the major inevitable challenges facing the business organizations today is to provide adequate QoS aspects for Web services. This paper gathers together the various techniques that can be used for measuring and optimizing the major QoS requirements for Web services proposed by the World Wide Consortium (W3C), while presenting a methodology to build QoS-aware Web services. A software model was designed and implemented to test a Web service and perform the experiments to quantitatively measure the QoS requirements involved in a Web service. Various modeling tests and experiments were designed and conducted to illustrate the proposed QoS measurement metrics. The techniques discussed in this paper can be incorporated into the planning, design, implementation, deployment, operational and maintenance phases during a Web service development lifecycle.

Internet and Mobile technologies have greatly changed our lives in the past decade. However, the power and patentlals of the cambined capabilities offered by these two major inventions remain untapped. This paper looks into how we can turn these capabilities into service components that can be assembled into various composite services and enable people to have a simple way to enjoy camprehensive services anytime, anywhere, anyway with user and context relevance. We will explain in this paper how Web Services technologies and Service Oriented Architecture enables rapidly service creation; and the power of combining web technologies and mobile capabilities for service execution. Tourism is ane vertical industry chosen to apply this Service Provisioning concept. A packaged tour prototype is built to demonstrate the creation and execution of various tour services. These packaged tour services inciude both web and mobile service components and are described in service logic. Utilising the published services co...

Business and IT leaders responsible for customers, channels, supply chain, and product strategy see exciting opportunities in Web Services. We’ve established five categories of Web Services technologies: Web Services development and assembly; Web Services deployment environments; UDDI and directory services; Web Services infrastructure services; and adaptive business process environments. This analysis presents our take on the roles and goals that business and IT leaders have in making Web Services investment decisions.

A Web Service Architecture for Enforcing Access Control Policies

Shared-Repository based Approach for Storing and Discovering web Services

Web Services technologies have over a period of time replaced expensive EDI links and have come to stay as the backbone for collaboration between various enterprises. While currently majority of Web Services are available free, over a period of time increased business dependencies of customers on Web Services are resulting in demands for better Quality of Service. Investments in newer technologies to improve Quality of Service results in increasing Cost of Service, which needs to be offset by revenues. While service providers seek predictability in revenues, customers and users of the Web Services seek flexibility in pricing by not being charged for services not used and service features that are not provided. QoS thus becomes a key determinant of pricing in Web Services. This paper attempts to define a framework for pricing Web Services based on the QoS features provided, the underlying Cost of Service and the level of predictability of revenues that accrue to the service provider based on the transaction volumes of various services. The proposed framework suggests a Subscription-based Pricing for Commoditized Web Services, Transaction-based Pricing for Channelized Web Services and Risk-Based Pricing for Customized Web Services.

Enterprise collaborative business systems utilize the technical methods to make the information between heterogeneous systems exchanging the information and sharing the resources. Compared with the traditional integration methods, the use of Web Services is a more flexible solution to the enterprise collaborative business systems. This paper first explores the enterprise collaborative business systems, such as ERP, SCM, and CRM and so on. Then this paper analyses the web services, including the advantages of web services, the architecture and the key technology of Web Services. At last, this paper advances a solution of enterprise collaborative business systems based on web services technology.

Over the last decade, Web services technology has emerged as a promising solution to address interoperability problems that prevent distributed software systems from being integrated with one another. Accordingly, an increasing number of Web services have been deployed over the Internet to overcome limitations of existing integration models. Typically to use Web services, service providers publish in service registries information about their Web services including the service qualities and bindings that the service consumers use to select first and then to bind to Web services they need. However, as Web services increase in number, the number of service registries holding this information is also increased raising the challenge of how to synchronize such information over these registries since it may change over time. To address the above challenge, we first review in this paper an example of a decentralized architecture of service repositories that highlights the need to synchronize Web service information, especially service bindings, and then, we propose an agent-based synchronization model to meet this need. Finally, an experimental study is conducted to evaluate the performance of our proposal.

Web service technologies are constantly being recreated, continuously challenging Web service professionals and examiners. Modern Technologies in Web Services Research facilitates communication and networking among Web services and e-business researchers and engineers in a period where considerable changes are taking place in Web services technologies innovation. Modern Technologies in Web Services Research provides mathematic foundations for service oriented computing, Web services architecture and security, frameworks for building Web service applications, and dynamic invocation mechanisms for Web services among other innovative approaches.

The recent evolution of internet technologies, mainly guided by the Extensible Markup Language (XML) and its related technologies, are extending the role of the World Wide Web from information interaction to service interaction. This next wave of the internet era is being driven by a concept named Web services. The Web services technology provides the underpinning to a new business opportunity, i.e., the possibility of providing value-added Web services. However, the building of value-added services on this new environment is not a trivial task. Due to the many singularities of the Web service environment, such as the inherent structural and behavioral heterogeneity of Web services, as well as their strict autonomy, it is not possible to rely on the current models and solutions to build and coordinate compositions of Web services. In this paper, we present a framework for building reliable Web service compositions on top of heterogeneous and autonomous Web services.

Service-oriented architectures and Web services are becoming an integral part of the IT landscape. An increasing number of organizations are building service-oriented architectures, all major application vendors have incorporated Web services interfaces in their products, and Web services are becoming an important mechanism for business-to-business transactions. The technology for realizing service-oriented architectures is maturing, making initial adoption easier. However, with larger deployments of Web services in organizations, new questions related to implementation strategies, governance approaches, and broader organizational impacts need to be considered. This mini-track addresses some of these issues in its two sessions. The first session focuses on the adoption, use, and impact of SOA and Web services technology, whereas the second session focuses on the aspect of software development in the context of SOA and Web services.