Mediating Capabilities with Delta-Relations

Mediation is concerned with handling heterogeneities that potentially occur between resources that shall interoperate. Heterogeneity being an inherent characteristic of open and distributed environments like the Internet, mediation becomes a core issue for next generation Web technologies. Recent developments around the Semantic Web and Semantic Web services address mediation on the data level and on the process level. This paper identifies the teleological level as a novel level of mediation that deals with heterogeneities of capabilities as the functional descriptions of Web services and service requests. The central mediation technique therefore are so-called ∆-relations that explicitly denote the logical relationships between capabilities. These can be used to perform central reasoning tasks for Semantic Web Services by simple inferences instead of more complex reasoning procedures, hence allow gaining efficiency in Semantic Web service technologies.

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