That's the way PKZip archives work. The directory is just stored as part of the filename. It's a little bit of a pain because it uses / as the separator chara

That's the way PKZip archives work. The directory is just stored as part of the filename. It's a little bit of a pain because it uses / as the separator character and a lot of Windows zip APIs will "fix" that for you, so there's a difference between what you get from the API versus what's actually stored in the archive entry record in the file. On the other end of the spectrum is the Amiga file system, where every file entry has an entire sector of metadata, and a directory is a linked list of those sectors.