Documentation for other versions: amCharts 4 (current) or amCharts 3.
SerialDataItem holds all the information about each series. When working with a chart, you do not create SerialDataItem objects or change it's properties directly. Consider properties of a SerialDataItem read-only - change values in chart's data provider if you need to. When serial chart parses dataProvider, it generates "chartData" array. Objects of this array are SerialDataItem objects.