The Macintosh Hierarchical File System (HFS) file system uses 31 characters in file names. Also all DOS special characters (except the colon) are valid HFS file name characters.
The AppleShare Client for Windows sees the truncated name, based on the DOS 8.3 file system naming convention. The Windows client implements a file name truncating algorithm, however the real file name is still the long Macintosh file name. This can be viewed in the File Manager's Properties dialog box.
This article was published in the "Information Alley": Volume II, Issue 6, Page 13