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In open systems, independent services exist in administrative domains outside that of the consumers of those services. Current standards exist to create management interfaces to allow operational management of services while keeping the services basic functionality fixed. These standards lack the ability to facilitate the establishment of agreements between services across administrative domains or...
Service component architecture (SCA) is a new promising programming model for constructing service-oriented application, which facilitates the development of business integration in SOA. However, there still lacks the unified theory foundations for the service component assembly based on SCA in a rigorous way. Firstly, a metamodel of the contract-based SCA is proposed by applying the idea of design...
Negotiation is a crucial stage of Web services interaction lifecycle, aiming at establishing a formal contract between a service provider and a consumer, to specify agreed terms on the service, particularly terms on non-functional aspects. This paper introduces a formal negotiation model for Web Services. The model employs fuzzy truth propositions to specify constraints attached to the service, and...
Electronic Contract (eContract) has been recognized as a good combination of technical specification and legal documentation for establishing and regulating virtual organizations built for dynamic collaborations. This paper presents a design and implementation of an eContract service with an aim of providing a trusted collaboration platform for collaborators. The implemented service uses Web services...
In this work we present a service recommender system for active services according to service requestors' goal in migrating workflows. The system is modeled as a multi-agent environment where clients and service agents negotiate using a Co-evolutionary Contract-Net (CeCN). In the negotiation, service organizations are an active side, avoiding "cognition- overloaded" and "drifting of...
Current fashion systems to interconnect large software architectures are moving toward SOA based solutions. This new paradigm for designing system can be improved, in our opinion, by using semantics. Semantics can a play a main role in boosting interoperability thanks to current technologies to express knowledge and to describe semantic Web services (SWS). This paper tackles the provision of a Software...
Accelerated by the rapid deployment of distributed systems and the Internet, online collaboration and information sharing are pervasive in enterprise computing environment. With regard to the requirements of online collaboration and information sharing, authentication information needs flexible manipulation to facilitate federation across trust domains. To achieve identity federation for federated...
In this paper we discuss the use cases for monitoring of Web services for compliance with policies and service level agreements. In particular, the quality of service associated with Web service interactions and its monitoring rely on the proper use by both parties of related Web service protocols. This monitoring is best served by an event-centric model and an extensible scripting language, such...
Service tailoring is a key operation when orchestrating system with Web services because of varieties of context of reusing services. It can not only improve the reuse capability of service, but also reduce difficulty of discovering service and matching service. Thereby, make the orchestration of service easy. As a generalization of interoperability check between services, parameterized contracts...
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