Business Rules - Market Data, "In preparation for the validation process, the market data, that is reported by the carriers, is reformatted and tab-delimited when copied to OAI’s WORK directory.", , Field Number,Description 1.  ,Data Type 2.  ,Carrier Code 3.  ,Carrier Entity (5 digit code) 4.  ,Data Date 5.  ,Origin Airport 6.  ,Destination Airport 7.  ,Service Class 8.  ,"Passengers in Market (# of passengers enplaned & deplaned) (110)" 9.  , - First Class (kept for historic purposes only) 10.  , - Coach Class (kept for historic purposes only) 11.  ,Freight in Market (217) 12.  ,Mail in Market (219)