Just as the industrial society of the last century depended on natural resources, today’s society depends on information. A lack of resources in the industrial society hindered development just as a lack of information hinders development in the information society. Consequently, the exchange of information becomes essential for more and more areas of society: Companies announce their products in online marketplaces and exchange electronic orders with their suppliers; in the medical area patient information is exchanged between general practitioners, hospitals and health insurances; public administration receive tax information from employers and offer online services to their citizens. As a reply to this increasing importance of information exchange, new technologies supporting a fast and accurate information exchange are being developed. Prominent examples of such new technologies are so-called
. These technologies address different aspects of the inherit complexity of information exchange. Semantic Web Technologies address the problem of
by providing advanced support for representing and processing information. Peer-to-Peer technologies, on the other hand, address
by allowing flexible and decentralized information storage and processing.