process boundary
A processual entity that is the fiat or bona fide instantaneous temporal process boundary.
obo:BFO_0000035
http://purl.obolibrary.org/obo/BFO_0000035
the incision at the beginning of a surgery
the detaching of a finger in an industrial accident
death
the final separation of two cells at the end of cell-division
birth
the forming of a synapse
the onset of REM sleep
occurrent