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The Web services framework is enabling applications from different providers to be offered as services that can be used and composed in a loosely-coupled manner. Subsequently, the aggregation of services to form composite applications and maximize reuse is key. While choreography has received the most attention, services often need to be aggregated in a much less constrained manner. As a number of...
One of the assumptions all the standards for web service composition (e.g. BPEL) make is that the business process is pre-defined. Obviously this assumption does not hold if business needs to accommodate changes in applications, technology, and organizational policies. We believe business processes can be dynamically built by composing web services if they are constructed based on and governed by...
Composition of E-Services in a multichannel environment requires taking into account the constraints imposed by the context: user profiles, geographical locations, available channels, and usable devices. In this paper, we propose an approach for context-aware composition of E-services based on an abstract description of both E-services and context. E-services are described in terms of functionality...
Web services bring programmers a new way to develop advanced applications able to integrate any group of services on the Internet into a single solution. Web services procurement (WSP) is focussed on the acquisition of web services, including some complex tasks such as the specification of demands, the search for available offers, and the best choice selection. Although the technology to support them...
Advances in the areas of mobile computing and web services lead to new scenarios of use and innovative applications. Our approach involves mobile devices that act not only as requestors of data, but as data providers as well, providing access to their data through web services. Context plays an important role in such a scenario, when used to improve existing service discovery mechanisms, by finding...
Web service technology has proved its way as a function integration enabler. The next step is to achieve application integration whereby one application is made available within the context of a consumer application, and this can also include the interface. This is the aim of the WSRP initiative, sponsored by OASIS. This initiative is standardizing the notion of Portlet as a user-facing, presentation-oriented...
In a virtual enterprise context, business process interoperability and cooperative process enactment are important in order to achieve a common objective despite the distribution in space, time and organizations. A contract is a facility that allows for deploying cross-organizational processes, monitoring and enforcing the composition and the enactment of these processes both inside and outside the...
The Web is an environment where users, Web services, and software agents exchange sensitive personal information. This calls for enforceable strategies to preserve people’s privacy. In most solutions, users define their respective privacy requirements and must themselves make the decision about information disclosure. Personal judgments are usually made based on the sensitivity of the information...
In this work, we present novel techniques for flexible and reliable execution and deployment of Web services which can be integrated into existing service platforms. The first technique, dynamic service selection, provides a layer of abstraction for service invocation offering Web services the possibility of selecting and invoking Web services at runtime based on a technical specification of the desired...
Business process integration and management have become the key success factors of transforming a company into an adaptive enterprise. Experiences show the fact that most of expenses for automating business processes attribute to the activities of both detecting business exceptions and repairing the emerging problems, due to highly dynamic business environments. In this paper, we describe our ongoing...
The advance in wireless networks and in positioning systems has led to a new class of mobile applications: location-based services (LBS). LBS offer highly personalized services to mobile users based on their locations, user profiles and static and dynamic content information. The publish/subscribe paradigm is an information dissemination model appropriate for the implementation of LBS. However, existing...
In distributed environments, collaboration is often achieved with the help of services. To enable automatic service trading, semantically expressive, automatically comparable, flexible, and editable service descriptions are needed. Our analysis shows that only ontology-based service descriptions like DAML-S offer the necessary expressiveness and flexibility. Unfortunately, up to now, DAML-S offers...
This paper presents a attempt to use the semantic web technologies to deploy and interact with a mathematical package called Bernina. This work is carried out within a European Union funded project called MONET aiming at demonstrating the application of the latest ideas for creating a semantic web to the world of mathematical software. While many of these ideas address the general problem of delivering...
A new technology for service description and composition in open and distributed environment is proposed. The technology consists of description language (called Entish) and composition protocol called entish 1.0. They are based on software agent paradigm. The description language is the contents language of the messages that are exchanged (between agents and services) according to the composition...
Web service deployment is hampered by the possibility of sudden variations in request volumes. Mechanisms exist to enhance scalability in times of heavy load when the delivered content is static. However, web services typically involve dynamic content, delivered through application servers which may have little to no support for adapting to varying loads in order to ensure timely delivery. In this...
The emerging Web services are building blocks for creating highly distributed e-Business applications, allowing any services to be integrated as long as they are Web-enabled. This interoperability allows businesses to dynamically discover and aggregate a range of component services to more easily create value-added composite services. One of the problems underlying the deployment of such composite...
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