What kind of text file it is depends on the program that's using it; there are three main file formats that utilize this file extension.
Kedu ụdị faịlụ ọ na-adabere n'usoro ihe omume ahụ na-eji ya; enwere faịlụ atọ kachasị elu nke na-ejikarị ndọtị WPD.