This professional book provides a series of case studies that give examples of real benefits to be derived from the adoption of semantic web based ontologies in real world situations, such as telecommunication, B2B integration, tourism, education and more. The book is designed to create platforms for bringing together experts from industry and academia from different countries and to compile the most recent use of semantics and ontologies. The book is for practitioners in industry, as well researchers and advanced-level students in computer science.