Sir i need to know when to use shared or union type in eer model

[wajeeha....@gmail.com]

Aoa,
Sir,
i have a question that under what circumstance i will
need the shared class
or . a subclass in eer model! what will be the advantage of using a
shared or uniontype
class . ! can you please tell some example of it !
i shall be grateful to you!
regards
wajeeha javed

[wajeeha....@gmail.com]

the shared class is wriiten by mistake here i meant to say the
shared subclass and the union type subclass .

On Dec 5, 6:17 am, "wajeeha.javed...@gmail.com"