0 Replies Latest reply on Jan 11, 2006 9:47 AM by LenHewitt

    Filename Conventions and Compatibility

    LenHewitt Level 1

      Windows has a maximum PATH length of 260 characters, so that includes
      the drive letter (+ colon and backslash) folder and sub-folder names and

      Under Windows using the NTFS file system file and folder names may be up
      to 256 characters long.

      The following characters are invalid as file or folder names on Windows
      using NTFS:
      / ? < > \ : * | " and any character you can type with the Ctrl key.
      In addition to the above illegal characters the caret ^ is also not
      permitted under Windows Operating Systems using the FAT file system.

      In addition to these characters, the following conventions are also illegal:
      Placing a space at the end of the name
      Placing a period at the end of the name

      The following file names are also reserved under Windows:
      com1, com2, com3, com4, com5, com6, com7, com8, com9, lpt1, lpt2,
      lpt3, lpt4, lpt5, lpt6, lpt7, lpt8, lpt9, con, nul, and prn


      The only illegal character for file and folder names in Mac OS 9 is the
      colon ":"

      File and folder names may be up to 31 characters in length


      Since Mac OS X is build on top of UNIX there are a few inherent
      conventions that OS 9 users may not expect. Because of this, migrating
      certain files and folders from OS 9 to OS X may cause unexpected behavior.

      The only illegal character for file and folder names in Mac OS X is the
      colon ":"

      File and folder names are not permitted to begin with a dot "."

      File and folder names may be up to 151 characters in length


      A file name can be up to 255 characters long. This restriction is a
      file name restriction not a path name length restriction.

      A file name can contain any character at all with the exception of
      slash ("/") which is used as a path name component separator and NUL (a
      character with all bits set to zero) which is used internally as a file
      name terminator. Thus a file name could consist entirely of space and
      back space characters.

      All characters are significant. In other words the Unix file naming
      system is case sensitive. Lower case file names are more common than
      upper case file names.

      File names do not have components or extensions. You can have as many
      dots as you like (up to 255 !) in a Unix file name. Many applications,
      however, regard the part of a file name after the last dot as having
      special significance.

      As any freshly created directory will contain entries "." and ".." (dot and
      dot-dot referring to the current directory and the parent directory,
      files cannot be named "." and ".."


      All filenames in URI's should conform to RFC 1630 (no spaces, necessary to escape characters etc.)