This field indicates whether an encumbrance should update the open (D) or closed amount (R) on the open encumbrances table and where on that adjusting transaction you'll find the document number to be adjusted, the Document Number (D) or the Reference Document Number (R).
- D - Update the Open Amount on the Document Number
- R - Update the Closed Amount on the Reference Number
Parameter ENCUMBRANCE_OPEN_AMOUNT_OVERRIDING_DOCUMENT_TYPES provides an exception to the above rules. The encumbrances created / released by the document types in this parameter will use R and will update the Open Amount on the Reference Number. Normally, these will be Purchase Order document types.