The main objective of this module is to introduce students to the fundamentals of knowledge systems and technologies. In particular, based on the framework of Description Logics, methodologies for object-oriented knowledge representation, management, evolution, as well as automated reasoning and semantic data integration algorithms are described. Moreover, emphasis is given to the analysis of W3C standards for semantic data and knowledge representation (XML, RDF, OWL etc), ontology engineering and applications of knowledge-based systems and intelligent web services.