%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
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%%  Beispiel 31-02-4 auf Seite 692.
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%%  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.
%% 
%% 
%% ==== 
% Show page(s) 1
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\documentclass[]{exaarticle}
\pagestyle{empty}
\setlength\textwidth{217.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{uml}
%StopShownPreambleCommands
\begin{document}
\umlDiagram[ref=Dia,sizeX=4cm,
  sizeY=2cm,innerBorder=5mm]{}
\umlClass[pos=\umlTop{Dia},
  refpoint=rt]{Klasse1}{}{}
\umlClass[pos=\umlRightSep{Klasse1},
  refpoint=lC]{Klasse2}{}{}
\umlClass[pos=\umlBottomSep{Klasse2},
  refpoint=rt]{LetzteKlasse}{}{}
\end{document}