A Topic-based approach to express dynamic capabilities of Semantic WS-Resources

The release of WSRF showed that an OGSA infrastructure of stateful WS-Resources could be built on top of plain WSDL, while retaining Web services as stateless entities. This Grid and SOA convergence allows developers to focus on enrich descriptions with current Semantic Web services technologies (SWS), whereas WSRF and WSNotification provide the mechanisms to build stateful and distributed architectures. However, we think a direct exportation of SWS interfaces to describe WS-Resources would be of limited value, due to property changes are not properly captured with static profiles, and current WSRF lacks of semantic features. We propose a topic-based modeling of WS-Resource capabilities, along with simple WSRF and WSNotification extensions to achieve ´semantic-by-design´ WS-Resource descriptions. We also illustrate how these enhancements can be applied to our Semantic Web Data Sources Integrated Architecture (DAWIS), allowing dynamic matching and discovering of Semantic WSResources.