To specify interest rate and type and the applicable time period
Code identifying the type of interest
INT01 indicates the type of interest, for example, mortgage note or debenture interest.
The interest rate as a percentage
INT02 is the interest rate as a percentage.
Code indicating the date format, time format, or date and time format
P0304: If either INT-03 or INT-04 is present, then the other is required
INT03 indicates the range of date format for INT04.
Expression of a date, a time, or range of dates, times or dates and times
INT04 indicates the range of dates to which the interest rate applies.
Numeric value of quantity
INT05 indicates the number of days represented by the range of dates in INT04.