Hi @TristanM-TD,

I think the separation of reading/writing from the collection of the data is a good idea. I am thinking about a large dictionary with the keys representing the different classes, and not multiple variables. Would that be fine for you?

{
    "Connection": {...},
    "Components": {
        "HeatExchanger": {...},
        "Turbine": {...},
    },
    "Bus": {...},
    "Network": {...},
}

Thinking more about it, it could actually be kind of beneficial to have just one large .json file for network states or exports... Same for loading it. Then people do not need to deal with multiple files, if they want to deal with the contents separately. On the downside, the contents would then become less humanly readable. Any opinion on this?