أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
it is nothing but a pointer has no data type assign to it . For example you can assign integer or character to it and the type of pointer will be determined on compilation .
It is one why of Generic in C . If you want some thing in ABAP it will be like field sample .
I hope the idea is become clear to you .