This concerns transfer of pax & baggage from short haul to long haul ie interlining but with no burden/risk to the airlines themselves but all taken on by STN itself.
STN will provide software that will communicate between the two respective airlines booking systems so it can track where the baggage is due to go.
Bags to be treated as though the carriers have an interline agreement moving them from one a/c to another eliminating the need for multiple check-in as per...