Figure 3
From: Self-organizing ontology of biochemically relevant small molecules
![Figure 3](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1471-2105-13-3/MediaObjects/12859_2011_Article_5010_Fig3_HTML.jpg)
Establishing a chemical class hierarchy through direct observation of consensus structural fingerprints is similar to logical hierarchy construction. It is possible to infer parent/child relationships based solely on the consensus features of a class. Formal logic affords much more powerful expressions.