%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  7. Auflage
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%%  Beispiel 15-04-18 auf Seite 278.
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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{169.16928pt}
\setlength\parindent{0pt}
%StartShownPreambleCommands
\usepackage{pst-node}
%StopShownPreambleCommands
\begin{document}
\begin{pspicture}(4,2)
 \rput[tl](0,2){\rnode{A}{\psframebox{Knoten A}}}
 \rput[br](4,0){\ovalnode{B}{Knoten B}}
 \nccurve[angleB=180,ncurv=0.9]{A}{B}
\end{pspicture}
\end{document}