With computing devices and the Internet becoming ubiquitous, users can make use of network-based software applications in different places and situations. Mobile devices with Internet connectivity are a good example of this trend. Network-based software applications are being exposed to users as web services, which makes them accessible on demand, when and where the users require them in their ...

Quality of service (QoS) is an important issue in the design and management of web service composition. QoS in web services consists of various non-functional factors, such as execution cost, execution time, availability, successful execution rate, and security. In recent years, the number of available web services has proliferated, and then offered the same services increasingly. The same web ...

Service composition provides value-adding services through composing basic Web services, which may be provided by various organizations. Cloud computing presents an efficient managerial, on-demand, and scalable way to integrate computational resources (hardware, platform, and software). However, existing Cloud architecture lacks the layer of middleware to enable dynamic service composition. To ...

Flexible and dynamic interoperation of autonomous information systems often requires automated or semiautomated combination of several highly distributed and heterogeneous web services. Web service composition aims to accelerate rapid application development and service reuse as well as to provide access to a variety of complex services. There are several approaches developed for the web servic...

Web Service: Self-contained software module available via a network. SOA: Service-oriented architecture, a software architecture based on Web services. BP: A Business Process “consists of a set of activities that are performed in coordination in an organizational and technical environment.”[42] BPM: Business Process Management “includes concepts, methods, and techniques to support the design, a...

The fundamental paradigm shift from traditional value chains to agile service value networks implies new economic and organizational challenges. As coordination mechanisms, auctions have proven to perform quite well in situations where intangible and heterogeneous goods are traded. Nevertheless traditional approaches in the area of multiattribute combinatorial auctions are not quite suitable to...

Service discovery and service aggregation are two crucial issues in the emerging area of Service-oriented Computing (SoC). We propose a new technique for the discovery of (Web) services that accounts for the need of composing several services to satisfy a client query. The proposed algorithm makes use of OWL-S ontologies, and explicitly returns the sequence of atomic process invocations that th...

The collaboration of cyber physical systems poses many real-world challenges, such as knowledge restriction, resource contention, and communication limitation. Service oriented architecture has been proven effective in solving interoperability issues in the software engineering field. The semantic web service helps to automate service discovery and integration with semantic information. This ch...

We study how to compose services in the presence of security constraints. By analysing the abstract behaviour of a set of services, we are able to determine the plans that drive safe program executions. These plans can be of different kinds, and we study here three of them, with different expressive power. Simple plans choose a single service for each request; multi-choice plans instead can cho...

Web services, in essence, are software systems that can be invoked by a client over a network using standard Internet protocols to realize a desired task. Clients can take the form of a human being or another service itself, and in practice, multiple different clients might interact with the service simultaneously by executing multiple instances of the service implementation. During the interac...