The book "Ontologies and Databases" offers a comprehensive collection of significant contributions and current research findings in a dynamic and rapidly evolving field. It serves as a valuable reference and sheds light on some of the most challenging research questions in ontology and database research. The compilation of expert contributions allows readers to gain deeper insights into the subject matter and become familiar with the latest developments and trends. This specialized book is particularly suitable for researchers, students, and professionals who wish to engage with the complex relationships between ontologies and databases.