http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#ILAE_1981_Seizure_Classification

ILAE_1981_Seizure_Classification

Bancaud 1981 The charge to the
 Commission was to: (1) complete the development of a revision of the International
 Classification of Epileptic Seizures based
upon a study of videotapes of simultaneously recorded electrical and clinical manifestations of epileptic seizures; (2) obtain 
the majority approval of the Classification
of Epileptic Seizures from the active chapters of the League and other pertinent international societies; (3) promote the use of
this classification throughout the world; (4) develop a current dictionary of epilepsy and promote its use throughout the world; (5) develop a classification of the epilepsies, acquire approval of a classification, and promote its use throughout the world.

http://www.semanticweb.org/rjyy/ontologies/2015/5/ESSO#Classification_System