Creating data bindings
Data binding establishes a relationship between chart or report items and the underlying data source. When a user types a parameter in response to a prompt from the report, the data values of the chart or report item change, and BIRT updates the chart or report.
From within the chart builder, you can add, edit, and delete data bindings using the data set linked to the chart. From the Select Data page, choose Data Binding. Select Data Binding, shown in Figure 21‑26, appears.
Figure 21‑26 Creating data bindings
Use Add, Edit, or Remove to perform the data binding tasks. Choose Add Aggregation to create a computed column using the aggregate functions described earlier in this guide.