47 
 
Figure 4.25 AmericanHotPizza classified as SpicyPizza 
 
Exercise 26: Create an InterestingPizza that has at least three toppings 
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1. Create a subclass of Pizza called InterestingPizza.   
2. Click on the Add icon (+) next to the SubClass Of field. Use the Class expression editor tab and enter 
hasTopping min 3 PizzaTopping and click on OK.  
3. Make sure InterestingPizza is still selected and use the Edit>Convert to defined class option to turn 
InterestingPizza into a defined class. 
4. Run the reasoner.  
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Go to the Class hierarchy (inferred) tab in the Classes tab and click on InterestingPizza. You should see 
that there are three Pizza classes that are classified as interesting: AmericanaHotPizza, AmericanaPizza, 
and SohoPizza.