Note that "Ethnologue" made multiple changes to Guthrie in an attempt to make the classification more historically accurate. However, the changes are inconsistent, and "Ethnologue" has not been followed here, though it is publicly available online. Thus a code may mean different things depending on whether Guthrie or SIL is being followed. (See link below for the SIL code assignments.) The updates in Maho (2009), on the other hand, are designed to be compatible with the original values of the codes.