
56 ◾ Rajendra Akerkar
<owl:Class rdf:about=”#Hotel”/>
</rdf:type>
</owl:Individual>
An axiom is dened as a class, property, or individual. Axioms are used to associ-
ate class and property identiers with partial or complete specications of their
characteristics and reveal other logical information about classes and properties.
Figure2.7 illustrates the language construct using OWLviz. e three OWL lan-
guage constructs for class axioms are rdfs:subClassOf, owl:equivalentClass, and
owl:disjointWith. In the following example (see gure), we present disjoint classes
using the owl:disjointWith property; it shows that DatePeriod and TimeP ...