Why does 0RECORDMODE exist ? What is its usecase ?

[Asharul]

I know the types and how records of each type behaves etc. But from practical perspective what useful insight is gained from 0RECORDMODE?

[roland_szajko]

It's needed for deltas, so the before, after and reverse/delete images can be identified and processed accordingly.

For example in a DSO with Changelog without the corresponding before/after pairs, it would not be possible to rollback requests, since then the system would not know what the previous value was.