Constraint Driven Web Service Composition in METEOR-S
SCC '04 Proceedings of the 2004 IEEE International Conference on Services Computing
A Meta-model for Non-functional Property Descriptions of Web Services
ICWS '08 Proceedings of the 2008 IEEE International Conference on Web Services
Modeling and Transforming Abstract Constraints for Automatic Service Composition
CIT '09 Proceedings of the 2009 Ninth IEEE International Conference on Computer and Information Technology - Volume 02
A constraint-based approach to horizontal web service composition
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
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Service-oriented computing provides an evolving paradigm for flexible and scalable applications of open systems. Web services and their automatic composition are in the mainstream of the evolution of new value-added services. Functional and non-functional aspects are considered together for automatic service composition (ASC). After locating suitable functionality for the required composition, non-functionalities are considered to select the final set of services. Non-functional properties (NFPs) obtained from users or identified during planning or discovery usually have abstract concepts that cannot be identified at the selection stage. In this paper, we propose a transformation technique for automatic composition that identifies binding information in the selection stage from intermediate abstract NFPs. The classification of abstraction level in NFPs, a model to define abstract and concrete NFPs, and an algorithm for transformation from intermediate to concrete level are presented. The identification of the binding information is based on domain ontologies for services. Evaluation in our algorithm according to characteristics of NFPs is shown. Our work will contribute to modeling and identification of NFPs for ASC.