FSCM : Significance of Visa Merchant category code on Credit Card Transaction Error page
In FSCM 9.0 travel and expenses module, under the Credit card transaction errors page, the Merchant category code field is setup as a non-editable field, but in FSCM 9.2, the same field is editable. It seems to accept any 5 char string and does not seem to have any pre-defined values in system setup tables.
Can anyone tell me what is the significance of this Visa Merchant category code?