DB Logoff vs. Schema Logoff

I was creating a trigger to fire when a user ends a session, but I see that you could have it fire on a SCHEMA event :

CREATE TRIGGER "SRU"."TEST" BEFORE
LOGOFF ON "SRU".SCHEMA or a DATABASE event :

CREATE TRIGGER "SRU"."TEST" BEFORE
LOGOFF ON DATABASE The "Event Type" in both cases is listed as Database, so are these 2 different events, or just the same thing listed in 2 different places?

Thanks,

Michael.

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