PM answered in detail.
I understand that you would not have wanted to put them on the forum although in fact there is no commercially sensitive information there.
They are configuration messages sent by an airline to the GDSs which are parsed to construct timetable and schedule displays for that airline.
The response in a GDS would be something like this (which of course is fictitious) :
BA 123 LHR MAD JCDIYMLWBXGQNO/B 1205 1415 27FEB13-27OCT13 12345
319
CONFIG C16 M123
showing flight number/route/subclasses/mealcode/timings/period of effectivity/day operated/aircraft type/cabin config
There's other stuff they'll show too.
Last edited by Capetonian; 14th April 2013 at 17:16.