I've discovered that svn has concept of file groups. User can define several file groups to do some operations on them easily. These groups could overlaps IIUC. So, I think most likely in TortoiseSVN these groups explicitly used.
I've discovered that svn has concept of file groups. User can define several file groups to do some operations on them easily. These groups could overlaps IIUC. So, I think most likely in TortoiseSVN these groups explicitly used.