ZoomCharts Documentation
Hierarchy
Pie Chart uses identifiers to support hierarchical data display.
Each pie and slice has it's own identifier, stored in the id
field.
When user clicks on a slice the corresponding slice identifier is used to load a new sub-pie with the same identifier. A new data request is made and data source must return data for that pie.
If you want to just have a simple flat Pie Chart, just skip the ID field.