TopLogic keeps a change history for every business object. These functions allow querying the changes of a business object and reverting them if needed.

A change is a business object of type tl.changelog:ChangeSet. The following attributes are available on a ChangeSet (selection):

• revision – the revision of the change.
• author / date / message – metadata of the change.
• revertedBy – when the change has been reverted, the revert ChangeSet; otherwise null.
• isRevert – whether this ChangeSet itself undoes a previous change.
• isRedo – whether this ChangeSet itself re-applies a previously reverted change.