KDDBroker: Description and Discovery of KDD Services

Service Oriented Architectures (SOA) can be profitably used in the domain of distributed Knowledge Discovery in Databases (KDD), since they provide a way to effectively share and re-use information, tools, models and domain expertise, and to compose different tools to design a KDD process. A key SOA component is the service broker, which provides service publishing and discovering facilities, by exploiting information stored in the UDDI registry. In this paper we present the results of an ongoing project for the design of a KDD service broker, which extends the existing standards in order to introduce semantic information on the KDD domain. In particular, the paper focuses on the semantic description and discovery of Data Mining tools. To this end, we introduce an ontology that, at this stage, represents a categorization of Data Mining domain in terms of tasks, methods and algorithms, and gives linkability relations among them. The ontology is then exploited for tool annotation. We discuss a possible architecture for the inclusion of the ontology in the UDDI, and present the implementation of the service broker functionalities.