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Filename




# computer id (IP address, domain name or LAN computer name eg: wikipedia.org, 207.142.131.206 or \MYCOMPUTER )
# device(drive, root mountpoint, disc, volume, eg: C:, /)
# path (position in directory tree : everything between the first and last path separator)
# filename

In order to refer to a file on a remote computer (aka: host, server) its network id must be provided. If an URI does not contain a path part, the file is assumed to be in the current working directory.

Many systems, including DOS and UNIX, allow a Filename Extension that consists of one or more characters following the last period thus dividing the filename into two parts

  • the basename (aka: proper filename, primary filename)

  • and the extension (usually indicating the File Type associated with a certain file format or Mime Type )


Within a single directory, filenames must be unique. However, two files in different directories may have the same name. Some operating systems, such as UNIX and the Macintosh operating system, allow a file to have more than one name, called an ''alias'' or ).

Note: These are different from windows shortcuts, Symbolic Link s, soft links or hyperlinks.


RESERVED WORDS


On most operating systems a filename may not contain any of the following characters because they have special meanings in the filesystem:

  • any control character (0-31)

  • / SLASH (used as a path separator; symbol for the root on UNIX)

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