The PivotEngine is the main data management class for wijmo.olap. It manages the raw data and allows user to build view definitions by configuring fields and field lists. Data summaries can be viewed using the PivotGrid and PivotChart controls. To start using the PivotEngine, bind your data source to the itemsSource property. This example shows a FlexGrid with raw data and a PivotGrid with summarized data from the PivotEngine.