
Chapter 7: Programming Guide 7-133
Parsing Parameter String Options
Variable Length Fields
Variable Length Field Name Selector Comments
Transit Number T Full 9 digit routing/transit number
Bank Number B Digits 4-8 of transit number
Check Digit D Digit 9 of transit number
Account Number A
Check Serial Number C Separate from account number
Amount $ This field may not be present or
readable
Variable Length Field Optional
Modifiers
Selector
Comments
Zero fill to length 0 ASCII zero preceding maximum
length
Maximum length nn 1- or 2-digit ASCII number
Remove space/dash X
Replace space/dash with 0 x
Examples of Variable Length Field Format Specifications
Account #, all characters in the field, keep spaces and dashes A
Account #, all characters in the field, replace spaces and dashes xA
Account #, maximum 12 characters, keep spaces and dashes 12A
Account #, always 12 characters zero filled, remove spaces and
dashes
012XA
(Parsing Parameter String Options—continued on the next page)
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