http://www.co-ode.org/ontologies/pizza/pizza.owlversion 1.5
v.1.4. Added Food class (used in domain/range of hasIngredient), Added several hasCountryOfOrigin restrictions on pizzas, Made hasTopping invers functional
v.1.5. Removed protege.owl import and references. Made ontology URI date-independent
http://www.w3.org/2002/07/owl#Ontology
An example ontology that contains all constructs required for the various versions of the Pizza Tutorial run by Manchester University (see http://www.co-ode.org/resources/tutorials/)