A nice review but maybe obsolete by now (run 2002-2005) One of the biggest problems we nowadays face in the information society is information overload. The Semantic Web aims to overcome this problem by adding meaning to the Web, which can be exploited by software agents to whom people can delegate tasks. The aim of Esperonto is to bridge the gap between the actual World Wide Web and the Semantic Web by providing a service to "upgrade" existing content to Semantic Web content. Ontologies play a key role in this effort, aiming at unifying, bridging and integrating multiple heterogeneous, international and multilingual digital content.