The capabilities of the DataItem classifier are made available when you code a data item. A data item is an alias of another type and can include multiple field-level annotations.
DataItem NumberOfCars INT End
DataItem NumberOfDrivers INT End
As suggested by the examples, each alias is called a data item. A data item is an EGL type.
myCarCount NumberOfCars; const myAntiqueCarCount NumberOfCars = 5;
A data item is not only for simple types, but for other native and custom types.
A data item does not include a stereotype.