RDF Classes and Properties

Namespace prefix:'rdfs' URI:'http://www.w3.org/2000/01/rdf-schema#'
Resources may be instances of one or more classes
Indicated by rdf:type property
Resource http://www.cs.rpi.edu/students/puninj is rdf:type Student
Resource http://www.cs.rpi.edu/students/puninj is rdf:type Person
Student is rdfs:subClassOf Person
Property-centric approach

Define properties in terms of the classes of resource to which they apply