Personal Knowledge Graphs, Ontology, Datalog, AI.
place(y,_,_), has(x,y) ehas(x,y) :- skill(x,_,_), skill(y,_,_), has(x,y) Now, we are ready to express relations love("Volodia", "datalog") livein("Volodia", "Berlin") So, we encode ontology in relations. How can we generalize entities as a knowledge graph? Now, it is time for the abstract node.