(18th-July-2020)
• Individual-property-value triples form a flexible, universal representation for relations.
• Ontologies are required for knowledge sharing.
• OWL ontologies are built from individuals, classes, and properties. A class is a set of real and potential individuals. A property links an individual to a data type or an individual.
• The ability to explain reasoning and debug knowledge in terms of semantic content can improve the usability of a knowledge-based system.
• A meta-interpreter can be used to build a light-weight implementation of a knowledge-based system that can be customized to fit the requirements of the representation language.
• I would like to just check your level of understanding of Ontology, Sam has proposed that any n-ary relation P(X1, X2, X3, ... , Xn) can be reexpressed as n-1 binary relations, namely,
• P1(X1, X2).
• P2(X2, X3).
• P3(X3, X4).
• ...
• Pn - 1(Xn -1, Xn ).
• Explain to Sam why this may not be such a good idea. What problems would arise if Sam tried to do this?
• Other questions,
• A luxury hotel has multiple rooms to rent, each of which is comfortable and has a view. The hotel must also have more than one restaurant. There must be menu items for vegetarians and for meat eaters to eat in the restaurants.
• Define a luxury hotel in OWL, based on this description. Make reasonable assumptions where the specification is ambiguous.
• Suggest three other properties you would expect of a luxury hotel. For each, give the natural language definition and the OWL specification.
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