id	definition
AI	Assigned Identification
AN	Due to Number
DT	Date of Transaction
EI	Entity Identification (Primary)
ES	Entity Identification (Secondary)
IN	Invoice Number
LI	Location Identification
MA	Monetary Amount
MV	Measurement Value
PO	Purchase Order Number
PR	Pricing Specification
PS	Product or Service Identification
QY	Quantity
RP	Reference Identification (Primary)
RS	Reference Identification (Secondary)
RT	Rate
TT	Time of Transaction
TX	Tax Identification
UP	Unit Price
DFI	Depository Financial Institution (DFI) Identification Number