Abstract
Nowadays more and more companies and organizations implement their business services in the Internet due to the tremendous progress made recently in the field of Web services. It becomes possible to publish, locate and invoke applications across the Web. Thus, the ability to select efficiently and integrate at runtime services located in different sites on the Web is an important issue. In some situations, if no single Web service can satisfy the request of the user, there should be a possibility to combine existing services together in order to meet the user’s request. This paper provides a dual-layered model for web services, where the first model layer captures the high-level functional specifications (namely goals, achievement contexts, and external behaviours), and the second model layer captures the low-level functional specifications (namely interfaces). This model allows the service composition process to be performed on both high-level and low-level specifications. We also introduce the composition operators (both high-level and low-level) to allow composition of virtual services.
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Tari, A., Elgedawy, I. & Dahmani, A. A dual-layered model for web services representation and composition. J Intell Inf Syst 32, 237–265 (2009). https://doi.org/10.1007/s10844-008-0067-2
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DOI: https://doi.org/10.1007/s10844-008-0067-2