Class node
Individual node
Place / value node
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The Semantic Web represents everything as subject-predicate-object triples, and this simulator renders a live one as a real 3D force-directed graph: classes, individuals and values repel each other and are pulled together along predicate edges until the layout settles, exactly like a real knowledge-graph visualizer. Flip on RDFS reasoning to watch the reasoner walk the subclass hierarchy and add inferred type edges no one asserted by hand, add random triples to grow the graph, and build a basic-graph-pattern query from the Subject / Predicate / Object dropdowns — using ? as a SPARQL-style wildcard — to see exactly which triples in the store match, the same mechanism a real SPARQL endpoint uses over Linked Data such as DBpedia or Wikidata.