End Named Group (ENG), End Document (EDT), and End Page (EPG) structured fields

ACIF always assigns a null token name (X'FFFF') to the Exx structured fields it creates.

It does not modify the Exx structured field created by an application unless it creates an FQN type X'01' triplet for the corresponding Bxx structured field. In this case, it assigns a null token name (X'FFFF'), which forces a match with the Bxx name.