transaction support in pl/slql

i have a request ??

Is there any intension of expanding Transaction support into PL/SQL.
this would simplify GUI/client code to know the if a function failed it
roll back the transaction. right now i have to pass back some kind
error message that i look for to see if the transaction failed to
either run the commit or rollback command

i know about raise exception within sub blocks but i want a way to
roll back to the starting transaction.