%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  2. Auflage
%% 
%%  Beispiel 15-02-47 auf Seite 736.
%% 
%%  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.
%% 
%% 
%% ==== 
verbatimtex
%% 
\documentclass[]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{textcomp}
\begin{document}
etex
% --- start of displayed preamble in the book ---
input metaobj;
show_empty_boxes:=true;
% --- end of displayed preamble in the book ---
beginfig(1)
newEmptyBox.Bi(2cm,1cm) "framed(true)";
newEmptyBox.Bii(2cm,1cm);
Bi.s = origin;
Bi.n + (0,1cm) = Bii.s;
drawObj(Bi,Bii);
ncline(Bi)(Bii);
endfig;
end;
\end{document}