The following are recommended values sourced from the flow direction enumeration in IEC 61968-9 [61968]. Note that IEEE 2030.5 uses the Generator/Producer frame of reference, where "Forward" is defined as flow from a generator to a load. Example generators include DER such as solar inverters as well as flow from a grid to a premises.<br/><br/>0 = Not Applicable (default, if not specified)<br/><br/>1 = Forward<br/>Also known as "delivered" or "injected." Values using the Forward flow direction SHALL be positive.<br/><br/>2 = Lagging<br/>Values using the Lagging flow direction SHALL be positive.<br/><br/>3 = Leading<br/>Values using the Leading flow direction SHALL be positive.<br/><br/>4 = Net<br/>Defined as the absolute value of the Forward flow direction - the absolute value of the Reverse flow direction.<br/><br/>19 = Reverse<br/>Also known as "received" or "absorbed." Values using the Reverse flow direction SHALL be positive.<br/><br/>20 = Total<br/>Defined as the absolute value of the Forward flow direction + the absolute value of the Reverse flow direction. For polyphase measurement data, values using the Total flow direction are incremented when the absolute value of the sum of the phases is greater than zero. Values using the Total flow direction SHALL be positive.<br/><br/>21 = TotalByPhase<br/>Values using the TotalByPhase flow direction are incremented when the sum of the absolute values of the phases is greater than zero. The TotalByPhase flow direction SHOULD NOT be used for single phase measurement data. Values using the TotalByPhase flow direction SHALL be positive.<br/><br/>Other values from the flow direction enumeration in Table C.4 of IEC 61968-9 [61968] Edition 1.0 (2009-09) MAY be used. All other values reserved.<br/>