Figure 1

Overlap groups obtained when comparing both mappings directly. Shows the different types of obtained overlap while directly comparing the mappings generated by both methods, regardless of the ontology the mapping is provided for. The amount of mapped concepts for the formal definitions method is represented with a yellow circle and the lexical matching is illustrated with a turquoise circle. We identified the following five categories: a) exact (both lexical matching and formal definitions method generated exactly the same list of mapped concepts), b) formal ⊂ lexical (mapping generated by the formal definitions method is a subset of the list generated by lexical matching), c) lexical ⊂ formal (mapping generated by lexical matching is a subset of the list generated by the formal definitions method), d) overlap (both lists contain additionally mapped concepts and share only a certain overlap), and e) nothing (despite both methods generating a list of mapped concepts for a specific concept, both lists have nothing in common).