I've read multiple discussions about mapping of SAS fare types on the Flying Blue XP scheme. I understand that SAS Plus on short-haul European flights is not considered business class for FB XP and a "real" business class fare does not exist yet.

But how does it work when booking a short-haul European leg 1 and a long-haul leg 2 as one itinerary in business class ("SAS Business")? For example, for AMS-CPH-BOS, both legs are ticketed as J. Does the AMS-CPH leg give 10 XP (premium) or 15 XP (business)?