id description section req max_loop max_usage pos BAX Beginning Segment For Advance Consist And Transportation Automati H M 0 1 1 AES Automatic Equipment Identification Site Information H M 0 1 2 YNQ Yes/No Question H M 0 1 3 N9 Extended Reference Information H O 0 10 4 QTY Quantity Information H O 0 5 5 MEA Measurements H O 0 10 6 AEI Equipment Information Summary H O 0 16 7 EI Automatic Equipment Identification H M 500 1 8 QTY Quantity Information H O 0 20 9 MEA Measurements H O 0 20 10 DTM Date/Time Reference H O 0 20 11 TSI Automatic Equipment Tag Status Information H O 25 1 12 YNQ Yes/No Question H O 0 25 13 LQ Industry Code Identification H O 0 25 14 QTY Quantity Information H O 20 1 15 DTM Date/Time Reference H O 0 2 16