Fig. 2From: The Apollo Structured Vocabulary: an OWL2 ontology of phenomena in infectious disease epidemiology and population biology for use in epidemic simulationRepresentation of the equivalent class axiom for infection in Apollo-SV. Boxes represent named classes, boxes with curved bases represent anonymous classes, arrows represent object properties. In the boxes is the rdfs:label and the namespace of the source ontology, if different from Apollo-SV. Each arrow is labeled with the rdfs:label of the property it representsBack to article page