Collaborative business can become unreliable in terms of authorization policy conflicts, for example, when (1) incorrect role assignment or modification occurs in a service within one organization or (2) messages transferred from one organization are accessed by unqualified roles in other collaborating business partners. Therefore reliability verification based on access policies is critical fo...

Automatic composition of Web services is a challenging task as independently developed Web services are not always compatible with each other. In order to resolve the heterogeneity between Web services and improve the quality of Web service composition, we propose a new approach based on semantics for Web service composition, which widely deploys Petri Nets and ontology. This paper proposes a f...

The current standards for web service composition, e.g. BPEL. neither cater for dynamic service composition nor for dynamic business configuration. Our firm belief is that business processes can be built dynamically by composing web services in a model driven fashion where the design process is controlled and governed by a series of business rules. In this paper we examine the functional requir...

An approach for modeling Web service composition by Petri nets which is based on OWL-S is proposed. By this approach, first, control flow of the composite web service is modeled based on top-down method. Then data flow model is constructed with Petri nets according to data flow specification. After that, by using a bottom-up approach, synchronous composition, the data flow net of the composite ...

A new approach to model multi-agent systems with hierarchical colored Petri nets is introduced. Every agent has its colored Petri net system, when agents are composed into a MAS, we get hierarchical colored Petri net system of the multi-agent system, properties of the hierarchical colored Petri net system, such as reachability, deadlock detection and avoidance, fairness can be used to analyze d...

Recently, languages such as BPEL and CDL have been proposed to describe the way services can interact from a behavioral perspective. The emergence of these languages heralds an era where richer service descriptions, going beyond WSDL-like interfaces, will be available. However, what can these richer service descriptions serve for? This paper investigates a possible usage of behavioral service d...

Transactional property is crucial to the success of web service composite applications. In the dynamic and open web service environment, maintaining consistency is a new challenge. In this study, we propose a flexible web service transaction model FleWeSeT, which supports replaceability and compensation. We expand the WS-Frame framework and add various components to support the transaction-depe...

An increasing number of software applications and business processes are relying upon the use of web services to achieve their requirements. This is due in part to the use of standardized composition languages like the Business Process Execution Language (BPEL). BPEL allows the process designer to compose a procedural workflow from an arbitrary number of available web services and supplemental ...

Web services related technologies (especially web services compositions) play now a key role in e-Business and its future. Languages to compose web services, such as the OASIS WS-BPEL 2.0 standard, open a vast new field for programming in the large. But they also present a challenge for traditional white-box testing, due to the inclusion of specific instructions for concurrency, fault compensat...