نتایج جستجو برای: ws policy
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In this paper, we show how Web services descriptions can be extended with simple declarative behavior specification using interface expressions, a form of regular expressions that describe the possible sequences of externally observable events that a WS-BPEL process can perform. We describe how a concrete (executable) WS-BPEL process can be monitored with respect to such interface expressions, ...
Bi-directional request-response interaction is a standard communication pattern in Service Oriented Computing (SOC). Such a pattern should be interrupted in case of faults. In the literature, different approaches have been considered: WS-BPEL discards the response, while Jolie waits for it in order to allow the fault handler to appropriately close the conversation with the remote service. We in...
This paper presents an innovative access control model, referred to as Web service Access Control Version 1 (Ws-AC1), specifically tailored to Web services. The most distinguishing features of this model are the flexible granularity in protection objects and negotiation capabilities. Under Ws-AC1, an authorization can be associated with a single service and can specify for which parameter value...
Business-to-Business integration (B2Bi) as a core concept of Supply Chain Management (SCM) is a key success factor for enterprises today. Frequently, choreography models are used for agreeing about the overall message exchanges among integration partners while executable orchestration models derived from the choreography govern the local message flow of each individual participant. Today, ebXML...
Workflow provenance is an important supportive component that encompasses knowledge sharing, product reusability and process verification. The emerging cloud computing paradigm offers new application opportunities but also raises research challenges, such as integrity, privacy, security and legal related issues. In this paper, we propose a Colored Petri Net (CPN) model for diagnosis based on Op...
Research in web services has allowed reusable, distributed, loosely coupled components which can easily be composed to build systems or to produce more complex services. Composition of these components is generally done in an ad-hoc manner. As compositions of services become more widely used and, inevitably, more complex, there is a need to ensure that compositions of services obey constraints....
BACKGROUND Local failure after radical prostatectomy (RP) is common in patients with cancer extending beyond the capsule. Three prospectively randomized trials demonstrated an advantage for adjuvant radiotherapy (ART) compared with a wait-and-see (WS) policy. OBJECTIVE To determine the efficiency of ART after a 10-yr follow-up in the ARO 96-02 study. DESIGN, SETTING, AND PARTICIPANTS After ...
When SOA-based business processes are to be enhanced with security properties, the model-driven business process development approach enables an easier and more reliable security definition compared to manually crafting the security realizations afterwards. In this paper, we outline an appropriate security model definition and transformation approach, targeting the WS-SecurityPolicy and WS-BPEL...
Composite Web services are built as workflows made up of component Web services. WS-BPEL has become the de facto standard used for the development of above mentioned workflows. Apart from introducing main streamlines related to SOA architectures and WS-BPEL language, the paper identifies some crucial issues that must be solved during composite Web service development: granularity aggregated ins...
The Web Services architecture defines various specifications that applications may wish to use in combination. In this paper, we investigate the composition of the Web services specifications for business process execution (BPEL) and transactional coordination (WS-Coordination). We report on our experience in implementing a policy-driven model to declaratively program transactional processes an...
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