Qualifier values of 0035 in ISO9735

Test indicator (n1)

Indication that the structural level containing the test indicator is a test.

Code Description
1 Interchange is a test
Indicates that the interchange is a test.
2 Syntax only test
Test only syntax of structure.
3 Echo request
To be returned without change, except for this data element to have the value 4.
4 Echo response
Returned without change except for this data element changing from 3 to 4.