Understanding Family Ontology with Protégé and Description Logics
Explore the world of family ontology with a focus on Protégé and Description Logics. Learn about inferred class hierarchies, querying examples, and the importance of defining relationships accurately to obtain correct results in a closed world.
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Presentation Transcript
Family ontology example: Introduction to Prot g and Description Logics
Query example: Person who has at most 3 children. Returns incorrect result (no such person), although David has 2 children. The Reason: it is not stated that Richard and Robert are the ONLY two children (under OWA there may be more children that we do not know about)
Query example (cont.) To close the world, we must say that David is a parent of ONLY Richard and Robert can be done as a type assertion (has the same effect as closure axiom on classes)
The query in the closed world where David was defined to have exactly 2 children
