Technical Report: An Ontology of Services and Service Descriptions Aldo Gangemi Laboratory for Applied Ontology, Institute for Cognitive Sciences and Technology, National Research Council, I-00137 Rome, Italy gangemi@ip.rm.cnr.it Peter Mika, Marta Sabou Vrije Universiteit, Amsterdam de Boolelaan 1081a, 1081HV Amsterdam pmika, marta@cs.vu.nl Daniel Oberle Institute AIFB University of Karlsruhe 76128 Karlsruhe, Germany oberle@aifb.uni-karlsruhe.de November 28, 2003 1 Introduction This Technical Report covers original work by the authors on an Ontology of Ser- vices and Service Descriptions. This work has been initiated within the European WonderWeb project [won]. The WonderWeb architecture envisages a tight integration between web-based KR languages, ontology learning and manipulation tools, foundational ontologies and ontology building methodologies. WonderWeb also provides an infrastructure that facilitates plug’n’play engi- neering of ontology-based modules and, thus, the development and maintenance of comprehensive Semantic Web applications, an infrastructure which is called Application Server for the Semantic Web (ASSW) [OVMS03]. It facilitates re-use of existing modules, e.g. ontology stores, editors, and inference engines, combines means to coordinate the information flow between such modules, to define depen- dencies, to broadcast events between different modules and to translate between 1