[Ctags] file mappings in ctags

[Bill C. <wc...@by...>]

Hello,

Regarding:

Exuberant Ctags 5.5, Copyright (C) 1996-2003 Darren Hiebert
  Compiled: Apr  2 2003, 08:24:35
  Addresses: <dhi...@us...>, http://ctags.sourceforge.net
  Optional compiled features: +wildcards, +regex

I am using ctags with jedit on a linux machine.  I was pleasantly 
surprised when I discovered - quite by accident - that ctags has support 
for the 4GL programming language.

However, I cannot find from where this support originates.  I've read 
the man page and the Web site info.  I do not have any extra config 
options being set via .ctags files or env vars.  Where is this support 
being mapped?  If you see the output below, my mappings do not indicate 
4gl support.

I believe that the same parser that renders 4gl can also render color 
syntax for .ace files, since ACE is a subset of 4GL.  I'd like to 
configure this, but I have not been able to do so.  My config info 
follows below.  Thanks.

Bill Catlan

My run command is:

/usr/bin/ctags-exuberant

My target file is:  *.4gl

My mappings look like this:

bash-2.05b$ /usr/bin/ctags-exuberant --list-maps
Asm      *.asm *.ASM *.s *.S *.A51 *.29[kK] *.[68][68][kKsSxX] 
*.[xX][68][68]
Asp      *.asp *.asa
Awk      *.awk *.gawk *.mawk
BETA     *.bet
C        *.c
C++      *.c++ *.cc *.cp *.cpp *.cxx *.h *.h++ *.hh *.hp *.hpp *.hxx *.C *.H
C#       *.cs
Cobol    *.cbl *.cob *.CBL *.COB
Eiffel   *.e
Erlang   *.erl *.ERL *.hrl *.HRL
Fortran  *.f *.for *.ftn *.f77 *.f90 *.f95 *.F *.FOR *.FTN *.F77 *.F90 *.F95
HTML     *.htm *.html
Java     *.java
JavaScript *.js
Lisp     *.cl *.clisp *.el *.l *.lisp *.lsp *.ml
Lua      *.lua
Make     *.mak [Mm]akefile
Pascal   *.p *.pas
Perl     *.pl *.pm *.plx *.perl
PHP      *.php *.php3 *.phtml
Python   *.py *.python
REXX     *.cmd *.rexx *.rx
Ruby     *.rb
Scheme   *.SCM *.SM *.sch *.scheme *.scm *.sm
Sh       *.sh *.SH *.bsh *.bash *.ksh *.zsh
SLang    *.sl
SML      *.sml *.sig
SQL      *.sql
Tcl      *.tcl *.tk *.wish *.itcl
Vera     *.vr *.vri *.vrh
Verilog  *.v
Vim      *.vim
YACC     *.y