%% 
%%  A DANTE-Edition example
%% 
%%  Example 32-02-5 on page 655.
%% 
%%  Copyright (C) 2010 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{129.70511pt}
\setlength\parindent{0pt}

\usepackage{uml}

\begin{document}
\umlDiagram[ref=Dia,sizeX=3cm,sizeY=2cm]{}
\umlBox[pos=\umlTop{Dia},refpoint=t]{\Large Box1}
\umlBox[pos=\umlRight{Dia},refpoint=rC]{\Large Box2}
\umlBox[pos=\umlLeft{Dia},refpoint=lC]{\Large Box3}
\umlBox[pos=\umlBottom{Dia},refpoint=b]{\Large Box4}
\end{document}