chart-format.js

[
    {
        "dateTime": "2017-01-01T00:00:00.000Z",
        "items": [
            {
                "label": "Category",
                "items": [
                    {
                        "label": "Sub-category",
                        "dim1": 5,
                        "dim2": 1,
                        "dim3": 10
                    }
                ]
            }
        ]
    }
]

// Chart config
{
    "x": {
        "type": "sentiment",
        "key": "dim1"
    },
    "y": {
        "key": "dim2"
    },
    "size": {
        "key": "dim3"
    }
}