Customizing the IMD:201 Element
The IMD:2 segment (in the LIN group) contains the Item Description for each item in the invoice. The standard allows the IMD:2 segment to be used up to ten times per line item. Your users enter information in the IMD:2 segment only once per line item, so you have already changed the maximum use of this segment to one.
The IMD:201 element contains the Item Description Type, Coded for the invoiced item. You know that the only type of item description your users enter for this invoice is a free-form description. You need to define a constant value for the Item Description Type field, to indicate that the constant "F" (Free Form) qualifies the text in the Item Description field. When a user enters a free-form description in the Description field, the system automatically will assign the code "F" to the Item Description Type, Coded field.
Use this procedure to define a constant value and hide the Item Description Type, Coded field.