Looking for documentation about ‘DCL’ system on Oracle DB

I have inherited a project where there seems to be a ‘DCL system’ implemented.
I can’t find any documentation about it on the internet and keep getting results about Data Control Language.

My ‘DCL’ system is basically just 3 new columns in tables:

Timestamp, to store time of last action
Action, who gives some kind of Delta if it was Inserted Updated Deleted…
and User, to know who did the action.

Can you guys point me in the right direction here ?


Source: oracle

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