However, the development step is hardly ever done, because it relies on a clear ontology and semantically powerful AI concepts such as description logic or rule-based system, and most software engineers are largely unfamiliar with this. Ga evic and his co-authors try to fill this gap by closing the field of MDA application for ontology development in the Semantic Web.? Section II presents the first detailed explanation of OMG's new ODM (Ontology Definition Metamodel) initiative,? A specification is expected in the form of OMG language like UML. Finally, Section III is dedicated for applications and practical aspects of developing ontologies using MDA-based languages. This book is supported by many websites that show ontology, UML and other MDA-based model, and transformations between them. "This book is also suitable for those who just want to be notified about relevant technological landscape, to practitioners dealing with concrete problems, and researchers seeking pointers to areas of potentially fruitful research.