
Simple O ntologies in RDF and RDF Schema 49
• rdfs:Resource denotes the class of all resources (i.e. for all elements
of the considered domain of interest).
• rdf:Property refers to the class of all properties, and therefore to all
resources that stand for relations.
• rdf:XMLLiteral has already been introduced as the only predefined
datatype in RDF(S). At the same time, this name denotes the class of
all values of this datatype.
• rdfs:Literal represents the class of all literal values, which implies
that it comprises all datatypes as subclasses.
• The class denoted by rdfs:Datatype contains all datatypes as elements,
for example, the class of XML literals. ...