Source: PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1096 According to the above-described pattern and our ontological commitment, we could map the Genus provided in this definition to be equivalent to the process class defined in BFO. This allows us to define a chemical reaction class as a subclass of BFO's process using the first sentence of the Gold Book definition as its textual definition.