Optional ReadonlybandsBackground bands (operation modes); absent on most charts.
ReadonlyfromStart date of the report period.
ReadonlylabelsFormatted axis labels (dates, months, etc.).
ReadonlyseriesReadonlytoEnd date of the report period.
ReadonlyunitMeasurement unit label (e.g. '°C', 'dBm').
Line chart data with named series and a measurement unit.