The book *Foundations of Semantic Web Technologies* is a comprehensive textbook designed for both undergraduate and graduate students, as well as researchers and practitioners. It covers traditional areas of computing and related technical fields such as software engineering, artificial intelligence, computer engineering, information systems, and information technology. The authors, Pascal Hitzler, Markus Krötzsch, and Sebastian Rudolph, are renowned researchers and educators in the field of semantic technologies, currently working at the University of Karlsruhe, Germany. The book aims to provide an in-depth treatment of the foundational languages for the Semantic Web, including RDF, RDF Schema, OWL, and SPARQL. It also delves into the formal semantics of these languages, making it the first textbook to address the upcoming W3C-recommended standards OWL 2 and RIF. The content is structured to separate basic material from advanced content, ensuring that readers can easily access the foundational knowledge while also exploring more sophisticated aspects. Key topics covered include: - **RDF and RDF Schema**: Introduction to the syntax and underlying intuition, followed by a detailed explanation of their formal semantics. - **OWL**: Overview of the syntax, species, and the upcoming OWL 2 standard, along with a detailed treatment of its formal semantics. - **SPARQL**: Detailed explanation of the query language for RDF, including conjunctive queries for OWL. - **Rules and Rule Languages**: Discussion of rule languages and their integration with the Semantic Web technologies. - **Ontology Engineering**: Techniques for creating, quality assurance, and modular ontologies. - **Applications**: Examples of current applications of Semantic Web technologies. The book is accompanied by a website that provides updates, teaching materials, and additional resources. It is suitable for self-study and as a basis for university courses, offering a deep understanding of the core concepts and recent developments in the field of Semantic Web technologies.The book *Foundations of Semantic Web Technologies* is a comprehensive textbook designed for both undergraduate and graduate students, as well as researchers and practitioners. It covers traditional areas of computing and related technical fields such as software engineering, artificial intelligence, computer engineering, information systems, and information technology. The authors, Pascal Hitzler, Markus Krötzsch, and Sebastian Rudolph, are renowned researchers and educators in the field of semantic technologies, currently working at the University of Karlsruhe, Germany. The book aims to provide an in-depth treatment of the foundational languages for the Semantic Web, including RDF, RDF Schema, OWL, and SPARQL. It also delves into the formal semantics of these languages, making it the first textbook to address the upcoming W3C-recommended standards OWL 2 and RIF. The content is structured to separate basic material from advanced content, ensuring that readers can easily access the foundational knowledge while also exploring more sophisticated aspects. Key topics covered include: - **RDF and RDF Schema**: Introduction to the syntax and underlying intuition, followed by a detailed explanation of their formal semantics. - **OWL**: Overview of the syntax, species, and the upcoming OWL 2 standard, along with a detailed treatment of its formal semantics. - **SPARQL**: Detailed explanation of the query language for RDF, including conjunctive queries for OWL. - **Rules and Rule Languages**: Discussion of rule languages and their integration with the Semantic Web technologies. - **Ontology Engineering**: Techniques for creating, quality assurance, and modular ontologies. - **Applications**: Examples of current applications of Semantic Web technologies. The book is accompanied by a website that provides updates, teaching materials, and additional resources. It is suitable for self-study and as a basis for university courses, offering a deep understanding of the core concepts and recent developments in the field of Semantic Web technologies.