What is a DTA File Type?
The two most common are IS.dta, which is the system database, and IW.dta, which is the chain database. You can open DTA files with IWIS Chain Engineering, which n' is only available for Windows.
Only if the Chain Engineering program is installed on your computer will you likely encounter a Chain Engineering DTA file. If you do not have the n'program installed on your computer and do not specialize in industrial channel drives, your DTA file most likely contains different information.
IWIS specializes in automotive engineering and chain-transmission systems; industrial applications.
What is a Default DTA File Name?
Music.dta - Contains MIDI and OGG files for all music played in the game.
Player.dta contains sprites (graphics) for the playable characters of the game.