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.