Field help (BSITRSREF) 

This field displays the structured bank transaction codes included in a sub-detail transaction entry.
The field value for transaction code 1 represents the Domain code.
The field value for transaction code 2 represents the Family code.
The field value for transaction code 3 represents the Sub-family code.
Bank transaction codes represent a harmonized ISO20022 code set that helps to fully identify the type of underlying transaction and assigns it to a G/L account or a BP based on the search term list function.
Note: Using unstructured bank transaction codes requires modifying the standard bank import segment definition.

This sub-detail only represents CAMT.053/.054 transactions. It does not apply to other formats.