Mark Rotteveel wrote:

> On Windows, all files can have alternative streams with additional
> data. It is a form of hidden metadata that is attached to the main filename.

True, but the alternate data streams get lost when the file is stored
on a non-NTFS drive, sent via FTP/E-Mail etc. So depending on how the
software of the OP is released, this might not work well.

Anyway, rereading the original post, I realized that he is looking for
a platform independent solution, so my focus on Windows did not help
anyway.


Cheers,
Christian