Document Type
A user-defined code from UDC table (00/DT) that identifies the origin and purpose of the transaction. The system reserves several prefixes for document types, such as vouchers, invoices, receipts, and time sheets. The reserved document type prefixes for codes are:
P: Accounts payable documents.
R: Accounts receivable documents.
T: Time and Pay documents.
I: Inventory documents.
O: Purchase order documents.
S: Sales order documents.