Hi @Arnaud,
I have managed to find rather brief articles on
https://studio.uipath.com/v2017.1/docs/naming-best-practices-variables
https://studio.uipath.com/v2017.1/docs/naming-best-practices-arguments
So for a real help see the response from @ovi in:
where there is a whole discussion posted. Does this help you a bit?
More materials can be found on
as Ovi’s quotation comes from Best Practice Guide : UiPath Automation Best Practice Guide 05 25012018.pdf