WB, it is really easy and as KKOB says, just check your tags say DLM. I remember there is a time limit at Istanbul where if your stop over is more than 12 hours (May be less) you have to collect and rebook in. We usually have just over a hour with PGS so it's straight through with no worry about waiting for bags at Istanbul. At DLM you are met as you enter the terminal for the short ride across to the international terminal.
Thanks Simon.
I'm looking at an 11-hour wait so may have to collect but at least I know to check now!