You probably are referring to Master
(or Header
) / Detail
. Wherein the Parent
is the Master
(or Header
) and the child
is the Detail
as shown below:
The Order
from the Customer
above is the Parent
or Master
while the individual Items ordered (or as you termed it as Lines
) are the Details
.
So, in your case Invoice is the Master
and Invoice_lines is the Detail
etc.