For some perspective here: Various WWW tools for OS/2 back in the 1990s also did this, putting the source URL into a .SUBJECT extended attribute. The OS/2 por

For some perspective here: Various WWW tools for OS/2 back in the 1990s also did this, putting the source URL into a .SUBJECT extended attribute. The OS/2 port of wget was also modified to do this. It wasn't in any way secret. The .SUBJECT of a file was visible in its Properties dialogue on the Worksplace Shell desktop. Which one could also use to edit it. People like me wrote other tools for manipulating and viewing these .SUBJECTs, which were also used for file descriptions by 4OS2 and various OS/2 file management and BBS softwares. * https://jdebp.eu./Softwares/os2/ https://jdebp.eu./Softwares/os2/