I\'ve been reading about Semantic Web technologies such as RDF/RDFS and \"ontology\", but was wondering how each of these are related? At the moment the terms all seem inter
RDF is a way of modelling your data. In RDF you model your data in triples to create a graph. In relational databases you model your data in tables that are inter-related. RDFS is for providing schema level information - an analogy to relational databases would be the column fields for your tables.
For more you can check out the answers in this, essentially the same, question: What is the difference between RDF and OWL?