What is the Semantic Web? -- Semantic modeling -- RDFS -- the basis of the Semantic Web -- Semantic Web application architecture -- Querying the Semantic Web -- SPARQL -- RDF and inferencing -- RDF schema -- RDFS-Plus -- Using RDFS-Plus in the wild -- SKOS -- managing vocabularies with RDFS-Plus -- Basic OWL -- Counting and sets in OWL -- Ontologies on the Web -- putting it all together -- Good and bad modeling practices -- Expert modeling in OWL -- Conclusions.