w .org/ 00 /0 / owl#ObjectProperty???/>
The property hasDistance relates the class Region to the class Distance. The has-
Distance defined as owl:FunctionalProperty has at most one unique value for each
instance of the class Region.
Joo, Lee, and Jeong
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As shown in Figure 4, the properties from and to defined as Datatype properties
have string values and the property distanceValue has a positive integer. We can
infer the instances of the class Region having distance values less than a particular
value for a given region.
Implementation
We use Jena (n.d.) toolkit to implement the ontology design for the tourism business.
Jena is an open-source Semantic Web developer??™s kit as a set of Java application
program interfaces (APIs) for manipulating RDF models. It comprises a number of
modules including RDF API, ARP RDF/XML parser, ontology API, RDQL,(World
Wide Consortium, 2004b) and storage modules (Jena, n.
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