is prohibited.
tance, the distance is given to the region. The relation in either direction is true. The
hasDistance property is functional, that is, a region can have at most one distance.
The givenToRegion property is inverse functional, that is, a distance must be given
to a region. Properties, from, to, and distanceValue are datatype. The property distanceValue
takes a positive integer.
We can define tourist as the person who has at least one tour package. In the RDF
syntax, for example, Tourist represented in Person?‡Tour would be written as:
Figure 5. A semantic network representing region-distance ontology
Table 1. Types of property elements in region-distance ontology
Object Property
HasDistance FunctionalProperty
inverseOf GivenToRegion InverseFunctional Property
has Attraction
hasReataurant
??¦ inverseOf
LocatedIn TransitiveProperty
DatatypeProperty
From
String type
To
DistanceValue Integer Type
Joo, Lee, and Jeong
Copyright ?© 2007, Idea Group Inc. Copying or distributing in print or electronic forms without written permission
of Idea Group Inc.
Pages:
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609