Because there are a thousand ways to describe the same thing in JSON. This:

    city = {
        "id": 3,
        "name": "Foo",
        "lat": 3.555,
        "long": 4.11,
    }

Is the same as:

    city = {
        "id": "3",
        "name": "Foo",
        "coordinates": [3.555, 4.11]
    }

But you want to normalize that.

Something like Cuelang will:

- Define the schema that will let you know what you should put inside.

- Allow you to inflate that schema into a full file, providing only the values.

- Will generate always a correct file, with no typo, or format error.

- Will check that the data is correct and tell you if there are any errors.

- Is note theoretically tied to a particular run time or stack.