PieSet

Pie datasets require two and only two dimensions (columns) -- one for the pie piece names (the series) and one for the values that are used to calculate size of each pie piece. There are two chart types that work with Pie datasets: Pie and Ring.
Property Description
name A title for this data collector configuration. Typically you will only have one data collector per chart, in which case this property is not particularly useful.
value-column The data column that determines the chart values (or series items).
series-by-field Uses the selected column to use for series names. This will cause the value column to be split into series groups.
group-by This provides the name of the group that the chart is appearing in. If the chart contains detailed information, then this is not necessary.
reset-group Specifies a group that will be used to create charts within a sub-group. For example, if charting one chart per region, and the chart is displaying data for departments within a region, the reset-group would be set to the region group, and the chart group would be set to department group.