Which format for my regions/scenario settings?

I need to develop a new model where I need to have separate model settings for the definition of the various regions and scenarios within regions… not really the data itself, but the definition of the various dimensions (forest types, product names, …), the geographical limits of the simulation, the URL of the repositories where to download the data, etc…

All these settings will possibly become a scenario-specific struct.

Which format would you suggest to use between JSON, Yaml, TOML, or more generic XML, considering also the support in Julia ?