in this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. the engines are assumed to be implemented as composite web services. current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. the difficulty is to rollback the execution state of the workflo...

Web service composition is mandatory when complex functional requirements cannot be satisfied by a single Web service. Because of the exponential growth of available Web services, their automatic discovery and composition are highly desirable tasks. This paper presents a new approach for automatic Web service composition based on the formalism of Fluent Calculus using semantic service descripti...

To run a smart E-Business or provide efficient Web service, a web services composition model is needed. Web services composition refers to the process of collaborating the heterogeneous web services. This paper presents a model of web services composition by using Case-Based Reasoning (CBR) techniques. CBR is applied in the process of service discovery, which is the crucial composition process....

Multi-agent based semantic web service composition involves the composition of semantic web services considering each of the agent capability to serve a particular service request. This paper presents the two variations of semantic web service composition process based on the timing of negotiation in composition process. The variations are based on the concept that the negotiation between the s...

Web Service Discovery is the process of finding a suitable Web Service for a given task. A theoretical analysis of ontology-based service composition is proposed in terms of its dependency with service discovery. Web Service composition technique provides the features to users that an individual web service cannot perform. At service composition time, the composition of service depends on the u...

Web service composition is a new direction in the research of service computing. To promote the portfolio, the key problem is to achieve efficient and automatic composition process. We propose the web service composition model based on timed automata. In the computing framework, we design the formal model and its construction algorithm; provide a web service interface description language and c...

Web service composition is a distributed model to construct new web service on top of existing primitive or other composite web services. Many research efforts have been made in web services composition and coordination. In such a scenario, an important issue is how to assess the degree of trustworthiness one can have about the web service composition, especially their performance and dependabi...

Web services are widely used thanks to their features of universal interoperability between software assets, platform independent and loose-coupled. Web services composition is one of the most challenging topics in service computing area. In this paper, an approach based on High Level Petri-Net model as dynamic configuration schema of web services composition is proposed to achieve self adaptat...