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haftmann@30734
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haftmann@30734
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\documentclass[12pt]{article}
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haftmann@30734
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\usepackage{tikz}
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\usetikzlibrary{shapes}
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\usetikzlibrary{arrows}
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haftmann@30734
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\begin{document}
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haftmann@30754
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\thispagestyle{empty}
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\setlength{\fboxrule}{0.01pt}
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\setlength{\fboxsep}{4pt}
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\fcolorbox{white}{white}{
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\newcommand{\sys}[1]{\emph{#1}}
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\begin{tikzpicture}[x = 4cm, y = 1cm]
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\tikzstyle positive=[color = black, fill = white];
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\tikzstyle negative=[color = white, fill = black];
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\tikzstyle entity=[rounded corners, draw, thick];
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\tikzstyle process=[ellipse, draw, thick];
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\tikzstyle arrow=[-stealth, semithick];
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\node (spec) at (0, 3) [entity, positive] {specification tools};
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\node (user) at (1, 3) [entity, positive] {user proofs};
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\node (spec_user_join) at (0.5, 3) [shape=coordinate] {};
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\node (raw) at (0.5, 4) [entity, positive] {raw code equations};
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\node (pre) at (1.5, 4) [process, positive] {preprocessing};
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\node (eqn) at (2.5, 4) [entity, positive] {code equations};
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\node (iml) at (0.5, 0) [entity, positive] {intermediate program};
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\node (seri) at (1.5, 0) [process, positive] {serialisation};
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\node (SML) at (2.5, 3) [entity, positive] {\sys{SML}};
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\node (OCaml) at (2.5, 2) [entity, positive] {\sys{OCaml}};
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\node (further) at (2.5, 1) [entity, positive] {(\ldots)};
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\node (Haskell) at (2.5, 0) [entity, positive] {\sys{Haskell}};
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\draw [semithick] (spec) -- (spec_user_join);
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\draw [semithick] (user) -- (spec_user_join);
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\draw [-diamond, semithick] (spec_user_join) -- (raw);
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\draw [arrow] (raw) -- (pre);
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\draw [arrow] (pre) -- (eqn);
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\draw [arrow] (eqn) -- node (transl) [process, positive] {translation} (iml);
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\draw [arrow] (iml) -- (seri);
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\draw [arrow] (seri) -- (SML);
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\draw [arrow] (seri) -- (OCaml);
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\draw [arrow, dashed] (seri) -- (further);
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\draw [arrow] (seri) -- (Haskell);
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\end{tikzpicture}
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}
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\end{document}
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