Bayanat has an advanced revision history system that logs every change made to all three main components of the database. This system has two levels of details that are accessible to users with the necessary permissions.
This change log is accessible in the view mode of Actors, Bulletins and Incidents at the end of each item. For every update performed on an item there's a log entry that shows:
In addition to the simple log entry, the system takes a "snapshot" of the item when an update is performed. This allows the users to see exactly what changed in the item and compare two consecutive versions.