The WSLA Framework: Specifying and Monitoring Service Level Agreements for Web Services
Journal of Network and Systems Management
An Artificial Intelligence Perspective on Autonomic Computing Policies
POLICY '04 Proceedings of the Fifth IEEE International Workshop on Policies for Distributed Systems and Networks
On Comprehensive Contractual Descriptions of Web Services
EEE '05 Proceedings of the 2005 IEEE International Conference on e-Technology, e-Commerce and e-Service (EEE'05) on e-Technology, e-Commerce and e-Service
Management applications of the web service offerings language (WSOL)
Information Systems - Special issue: The 15th international conference on advanced information systems engineering (CAiSE 2003)
Policy-driven middleware for self-adaptation of web services compositions
Middleware'06 Proceedings of the 7th ACM/IFIP/USENIX international conference on Middleware
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Several languages for specification of various aspects of semantics, such as quality of service (QoS), of XML Web services have appeared recently. However, none of them is widely accepted by industry. On the other hand, WS-Policy (a general framework for the specification of policies for Web services) has strong industry support, but currently lacks detailed specification of ontological meaning, QoS, and other important aspects of semantics. We propose extending WS-Policy with comprehensive specification of semantics of Web services. First, we discuss specification of semantics with policies. Then, we state principles for describing semantics of Web services. Finally, we discuss strengths and weaknesses of WS-Policy and our proposal for extensions in the new WS-Policy4MASC language. These extensions enable that a Web service composition can be comprehensively described with WSDL, WSBPEL, and WS-Policy4MASC, without the need for OWL-S, WSLA, WSOL, or WS-Agreement.