I agree to your suggestion from your point of view (LDView). But if you need to do anything else than show a picture you have to know wheather it is an MPD file (container for several LDR or DAT files) or not. I also agree that it is easy to determine that a file has mpd content, but for windows (and unix I think) the extension is a basic instrument for determining its content. So why should we not use this systematics also for our files?
By the way, MLCad, the inventor of MPD-files suggests to save that file with the '.mpd' extension!
By the way, MLCad, the inventor of MPD-files suggests to save that file with the '.mpd' extension!