areachart-datalet data-url fields Categories The chart categories. Its values will be put in the horizontal axis. You need one value for each series. nominal domain 11 Series The chart series. Its values will be put in the vertical axis. nominal domain 11 title The label for the title of the chart x-axis-label The label for the X axis y-axis-label The label for the Y axis suffix The values suffix(eg units, dollars, euro, ...)