Only a doubt about IB_Cursor and IB_Query.

Why IB_Cursor closes dataset when the Append method is called?

with IB_Cursor do
begin
if not Prepared then
Prepare;
if not IB_Transaction.InTransaction then
IB_Transaction.StartTransaction;

First;
if Eof then
//*** here Active = True
Append;
//*** here Active = False
...

Meaning that the detail tables doesn't work on inserts.
Why it doesn't work like IB_Query that let dataset opened on insert
state?

D5 + IBO 4.2Ib + (IB_Cursor and IB_Query with RequestLive = True).

Thanks,

Fábio.