OptionalDataThis property is a union of DataSourceConfiguration from SPDataSource and WSDataSource.
OptionalDataThis property should be defined only when using StaticDataSource.
Defines what DataSource is used.
OptionalSearchDefines internal names of the fields to which the search query applies to. This property should be defined only when using SPDataSource with AutoCompleteRenderMode or DataTableRenderMode.
This interface is a union of SPDataSource, WSDataSource and StaticDataSource. This means that you should use properties from only one of the interfaces listed.