id	definition
A	Base Zip
B	Kilometers
C	Mileage
D	Rate Basis
E	Scale
F	Tariff Note
H	Household Goods Miles
M	Carrier Miles (Actual)
T	Association of American Railroads Docket 28300 Miles
X	Combination Mileage (Association of American Railroads Docket 28300 Followed by Actual Carrier Miles)
Y	Combination Mileage (Actual Carrier Miles Followed by Association of American Railroads 28300 Miles)