Hi Clinica devs,

The current longitudinal pipeline does not separate the session ids in the longitudinal id.

What it means is that if you have 3 sessions which are ses-M0, ses-M3, and ses-M6, the longitudinal id will be long-M1M3M6.
However if the sessions are ses-1, ses-2 and ses-3, then you get long-123, which makes it hard to read.

IMHO, adding a separator would enhance the readability and usability of the pipeline. On my side, I used a point as separator which would get the format to be long-1.2.3

Have a good day,
Matthieu