ODE-SWS: A Semantic Web Service Development Environment

Web Services (WS) are software modules that perform operations that are network-accessible through XML messaging. Web Services in the Semantic Web, that is, Semantic Web Services (SWS), should describe semantically their structure and capabilities to enable its automatic discovery, invocation and composition. In this work we present a development environment to design SWS in a language-independent manner. This environment is based on a framework that defines an ontology set to characterize how a SWS should be specified. The core ontology of this framework describes the SWS problem-solving behaviour and enables the SWS design at a conceptual level. Considering this framework, the SWS development environment is composed of (1) a graphical interface, in which the conceptual design of SWSs is performed, and (2) a tool set, which instantiates the framework ontologies according to the graphical model created by the user, verifies the completeness and consistency of the SWS through instance evaluation, and translates the SWS conceptual model description into SWS (and WS) languages, such as DAML-S, WSDL or UDDI. This tool set is integrated in the WebODE ontology engineering workbench in order to take advantage of its reasoning and ontology translation capabilities

A Collaborative Approach for Query Propagation in Peer-to-Peer Systems 1

Abstract. Sharing resources on a world-wide scale is a current research topic. Nowadays, peerto-peer architecture is considered as a scalable solution to this issue. However, a lot of problems to extend this architecture for data storage remain open. When information is not highly replicated, localization of nodes storing relevant data becomes essential to avoid covering completely the network. To this purpose, we try to propagate a query towards nodes potentially storing relevant data. Information about nodes relevance is obtained by users ’ experiences. In an applicative context where “communities of interest ” exist, we create logical and semantic links not only to specify the nodes relevant for a community, but also to link communities with a related interest. The proposed pattern has been created with respect to Peer-to-Peer philosophy and so as to consider the evolution of communities.