%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  2. Auflage
%% 
%%  Beispiel 10-07-28 auf Seite 516.
%% 
%%  Copyright (C) 2016 Herbert Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 
%% 
%% ==xindy -C utf8 -L general -I latex -M myModuleF== 
% Show page(s) 1
%% 
%% 
\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{352.81416pt}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\setlength\parindent{0pt}
\usepackage{filecontents,multicol}
\begin{filecontents*}{myModuleF.xdy}
(define-attributes ("default"))
(define-location-class "page-numbers" ("arabic-numbers"))
(markup-index :open  "~n\begin{theindex}~n"
              :close "~n\end{theindex}~n"
              :tree)
(markup-locclass-list :open "\quad{}")
(markup-locref-list   :sep ", ")
(markup-indexentry :open "~n  \item "           :depth 0)
( define-letter-group "A--D" :prefixes ("A" "B" "C" "D") )
( define-letter-group "E--G" :after "A--D" :prefixes ("E" "F" "G") )
( define-letter-group "H--K" :after "E--G" :prefixes ("H" "I" "J" "K") )
( define-letter-group "L--N" :after "H--K" :prefixes ("L" "M" "N" ) )
( define-letter-group "O--R" :after "L--N" :prefixes ("O" "P" "Q" "R") )
( define-letter-group "S--V" :after "O--R" :prefixes ("S" "T" "U" "V") )
( define-letter-group "W--Z" :after "S--V" :prefixes ("W" "X" "Y" "Z") )
(sort-rule "a" "A")
(sort-rule "b" "B")
(sort-rule "c" "C")
(sort-rule "d" "D")
(sort-rule "e" "E")
(sort-rule "f" "F")
(sort-rule "g" "G")
(sort-rule "h" "H")
(sort-rule "i" "I")
(sort-rule "j" "J")
(sort-rule "k" "K")
(sort-rule "l" "L")
(sort-rule "m" "M")
(sort-rule "n" "N")
(sort-rule "o" "O")
(sort-rule "p" "P")
(sort-rule "q" "Q")
(sort-rule "r" "R")
(sort-rule "s" "S")
(sort-rule "t" "T")
(sort-rule "u" "U")
(sort-rule "v" "V")
(sort-rule "w" "W")
(sort-rule "x" "X")
(sort-rule "y" "Y")
(sort-rule "z" "Z")
(markup-letter-group-list :sep "~n\indexspace")
(sort-rule "Ö" "O")
(sort-rule "ö" "o")
(merge-rule "\\[a-zA-Z@]+ *" "" :eregexp)
(merge-rule "\\[^a-zA-Z@]" "" :eregexp)
(merge-rule "^[{}$]" "" :eregexp)
(markup-letter-group :open-head "~n~n  \textbf{" :close-head "}~n" :capitalize)
\end{filecontents*}
\makeatletter
\renewenvironment{theindex}
  {\raggedright\small\let\item\@idxitem \parskip .0pt\@plus .3\p@\relax
   \begin{multicols}{2}}{\end{multicols}}
\makeatother
%StartShownPreambleCommands
\usepackage{makeidx}\makeindex
% xindy -C utf8 -I latex -M myModuleF datei.idx
%StopShownPreambleCommands
\begin{document}
\printindex     \newpage  foo
\index{Aal}   \index{Berg}\index{Cäsar}
\index{Donau} \index{Emil}\index{Flora}
\index{Garten}\index{Ober}\index{Zucker}
\index{Österreich}\index{klein}\index{groß}
\end{document}
