/usr/share/xindy/base/latin-lettergroups.xdy is in xindy-rules 2.4-1.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | ;; $Id: latin-lettergroups.xdy,v 1.3 2008/01/09 15:13:29 jschrod Exp $
;;------------------------------------------------------------
;;;
;;; latin lettergroups
;;;
(markup-letter-group :open-head "~n \lettergroupDefault{" :close-head "}"
:group "default")
(markup-letter-group :open-head "~n \lettergroup{" :close-head "}")
;;======================================================================
;;
;; $Log: latin-lettergroups.xdy,v $
;; Revision 1.3 2008/01/09 15:13:29 jschrod
;; Configurable section headline for the Default letter group.
;;
;; Revision 1.2 2006/11/07 01:16:50 jschrod
;; Prevent page break after letter group heading.
;; Introduce a \lettergroup tag for that, which can be redefined
;; by the user in an own theindex environment. (Ticket 1255990)
;;
;; Revision 1.1 2004/05/24 21:53:27 jschrod
;; Standard modules, introduced in "LaTeX Companion Release".
;;
|