On Dec 26, 4:43 am, Robert Klemme <shortcut... / googlemail.com> wrote:
> Also it seems, the spec is not yet fully clear
> (to you).

That was my thought. It seems the OP wants treat two different streams
as the same kind of data (but keyed on different values). I can think
of a way to abstract this, but it just "feels" wrong. Seems like this
kind of thing is best suited to a DB/ORM mapping rather than trying to
do it by hand.

Regards,
Joordan