superclass relation. Therefore, RDFS classes are mapped onto CLOS 
classes and RDFS instances are mapped onto CLOS instances in SWCLOS.</p>
<h3>5.1 &nbsp;Resource Classes, Metaclasses, and Instances </h3>
<p><b>Figure 5.1</b> shows the relationship in RDF(S) vocabulary. A broken 
curved line stands for rdf:type relation, and a solid straight line stands for 
rdfs:subClassOf relation. rdfs:Resource is a superclass of all other classes, 
and rdfs:Class is a class of all classes, including rdfs:Class itself. A