[en] Managing ontologies and annotated data throughout their life-cycles is at the core of semantic systems of all kinds. Ontology Management, an edited volume by distinguished leaders in this field, provides an up-to-date, scientifically correct, concise and easy-to- read reference. This volume includes relevant tasks, practical and theoretical challenges, limitations and methodologies, plus available tooling support. The editors discuss integrating the conceptual and technical dimensions with a business view on using ontologies, by stressing the cost dimension of ontology engineering and by providing guidance on how to derive ontologies semi-automatically from existing standards and specifications. Ontology Management is designed for researchers and advanced-level students studying semantic web services and web services, information systems, data and knowledge engineering, and the semantic web. Practitioners in industry will find this work invaluable