Abstract
The Internet provides possibilities for distributed execution of Business processes andWeb services. TheseWeb services might be composed to accomplish arbitrary complex tasks. Agents can compose these Web services as long as they know their semantics. Here process ontologies offer a way to give agents an understanding of the services offered. In this paper we discuss an approach to map the service descriptions from a process ontology given in OWL-S to reference nets, high-level Petri nets that can be executed within a simulator. These nets will be executed by agents in a FIPA-compliant multi agent framework enabling them to interact with Web services. Our conceptual framework is supported by the tool DAGEN.