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Compose(5)                                                          Compose(5)

       Compose - X client mappings for multi-key input sequences

       The  X  library, libX11, provides a simple input method for characters beyond those represented on typical key-
       boards using sequences of key strokes that are combined to enter a single character.

       The compose file is searched for in  the following order:

       -      If the environment variable $XCOMPOSEFILE is set, its value is used as the name of the Compose file.

       -      If the user's home directory has a file named .XCompose, it is used as the Compose file.

       -      The system provided compose file is used by mapping the locale to  a  compose  file  from  the  list  in

       Compose files can use an "include" instruction.  This allows local modifications to be made to existing compose
       files without including all of the content directly.  For example, the system's iso8859-1 compose file  can  be
       included with a line like this:
           include "%S/iso8859-1/Compose"

       There are several substitutions that can be made in the file name of the include instruction:

       %H  expands to the user's home directory (the $HOME environment variable)

       %L  expands  to  the  name  of the locale specific Compose file (i.e., "/usr/share/X11/locale/<localename>/Com-

       %S  expands to the name of the system directory for Compose files (i.e., "/usr/share/X11/locale")

       For example, you can include in your compose file the default Compose file by using:
              include "%L"
       and then rewrite only the few rules that you need to change.  New compose rules can be added, and previous ones

       Compose  files  are  plain  text files, with a separate line for each compose sequence.   Comments begin with #
       characters.   Each compose sequence specifies one or more events  and  a  resulting  input  sequence,  with  an
       optional comment at the end of the line:
              EVENT [EVENT...] : RESULT [# COMMENT]

       Each event consists of a specified input keysym, and optional modifier states:
              [([!] ([~] MODIFIER)...) | None] <keysym>

       If the modifier list is preceded by "!" it must match exactly.  MODIFIER may be one of Ctrl, Lock, Caps, Shift,
       Alt or Meta.  Each modifier may be preceded by a "~" character to  indicate  that  the  modifier  must  not  be
       present. If "None" is specified, no modifier may be present.

       The result specifies a string, keysym, or both, that the X client receives as input when the sequence of events
       is input:
              "STRING" | keysym | "STRING" keysym

       Keysyms are specified without the XK_ prefix.

       Strings may be direct text encoded in the locale for which the compose file is to be used, or an escaped  octal
       or hexadecimal character code.   Octal codes are specified as "\123" and hexadecimal codes as "\0x123a".  It is
       not necessary to specify in the right part of a rule a locale encoded string in addition to  the  keysym  name.
       If the string is omitted, Xlib figures it out from the keysym according to the current locale.  I.e., if a rule
       looks like:
              <dead_grave> <A> : "\300" Agrave
       the result of the composition is always the letter with the "\300" code.  But if the rule is:
              <dead_grave> <A> : Agrave
       the result depends on how Agrave is mapped in the current locale.

              File to use for compose sequences.

              Directory to use for caching compiled compose files.

              User default compose file if XCOMPOSEFILE is not set.

              File listing the compose file path to use for each locale.

              System default compose file for the locale, mapped via compose.dir.

              System-wide cache directory for compiled compose files.

              Per-user cache directory for compiled compose files.

       XLookupString(3), XmbLookupString(3), XwcLookupString(3), Xutf8LookupString(3), mkcomposecache(1), locale(7).
       Xlib - C Language X Interface

X Version 11                     libX11 1.6.4                       Compose(5)