%% 
%%  A DANTE-Edition example
%% 
%%  Example 16-06-1 on page 254.
%% 
%%  Copyright (C) 2011 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
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{201.70511pt}
\setlength\parindent{0pt}

\usepackage{pstricks,pst-node}

\begin{document}
\begin{pspicture}(3,3)
  \cnode(0.1,0.1){0.1cm}{A}
  \cnode(2.9,2.9){0.1cm}{B}
  \ncline{<->}{A}{B}
  \ncput*{on}
  \naput[npos=0.75]{above}
  \nbput[npos=0.25]{below}
\end{pspicture}
\end{document}