sort order of exported files?

Hi. When I press CTRL+E (export), the files displayed in MP3Tag are exported to a text file ... but in what order ??

I studied the export list and tried with different files and directories, but I just can't figure it out.

Many thanks.

From the help file:
$loop(%fieldname%) starts a new loop. The loop data is sorted by the fieldname.
$loopend() ends a loop.

many thanks,
and my apologies for having overlooked something from the help file

(I have seen so many export config files with "$loop(%_filename%)" that I somehow developed the misconception, that this would be the only way to create a loop.)