architecture.tex

\newlength{\moduledistance}
\setlength{\moduledistance}{1cm}
\overfullrule=2cm
\tikzset{
    module/.style={
           rectangle,
%           rounded corners,
           draw=mDarkTeal, very thick,
           minimum width=3cm,
           minimum height = 0.7cm,
           node distance = 1.5cm,
           inner sep=2pt,
           text centered,
           },
}

\tikzset{
    core/.style={
           circle,
           draw=mDarkTeal, very thick,
           minimum width=2cm,
           inner sep=2pt,
           text centered,
           },
}

\tikzset{
    arrow/.style={
           ->,
           draw=mDarkTeal, very thick,
    }
}

\tikzset{
    darrow/.style={
           <->,
           draw=mDarkTeal, very thick,
    }
}

\begin{tikzpicture}[->,>=stealth']
    \node[core] (core) {
        Core
    };
    \node[module,
          right of=core,
          right=\moduledistance,
          ] (grammatical) {
          Grammatical
    };
    \node[module,
          above of=core,
          above=1cm,
          ] (webui) {
        \begin{tabular}{c}
        Web User\\
        Interface
        \end{tabular}
    };
    \node[module,
          below of=grammatical,
          ] (standalone) {
        \begin{tabular}{c}
        Machine Learning\\Standalone
        \end{tabular}
    };
    \node[module,
          above of=grammatical,
          ] (reformulation) {
        \begin{tabular}{c}
        Machine Learning\\Reformulation
        \end{tabular}
    };
    \node[module,
          left of=core,
          left=\moduledistance,
          ] (spellchecker) {
        Spell-checker
    };
    \node[module,
          above of=spellchecker,
          ] (cas) {
        Computer Algebra
    };
    \node[module,
          above of=cas,
          ] (wikidata) {
        Wikidata
    };
    \node[module,
          below of=spellchecker,
          ] (oeis) {
        OEIS
    };
    \node[module,
          above of=reformulation,
%          right=\moduledistance,
          ] (logging) {
        Logging backend
    };
    \draw[mLightBrown,thick] ($(reformulation.north west)+(-0.3,0.3)$)  rectangle node[yshift=-2.5cm,below] {Question Parsing} ($(standalone.south east)+(0.3,-0.3)$);
    \draw[mLightBrown,thick] ($(wikidata.north west)+(-0.3,0.3)$)  rectangle node[yshift=-3cm,below] {Other modules} ($(oeis.south east)+(0.3,-0.3)$);

    \draw [darrow] (core)          -- node{} (cas.south east);
    \draw [darrow] (core)          -- node{} (wikidata.south east);
    \draw [darrow] (core)          -- node{} (spellchecker.east);
    \draw [darrow] (core)          -- node{} (oeis.north east);
    \draw [darrow] (core)          -- node{} (reformulation.south west);
    \draw [darrow] (core)          -- node{} (grammatical.west);
    \draw [darrow] (core)          -- node{} (standalone.north west);
    \draw [darrow] (core)          -- node{} (webui.south);
    \draw [darrow] (webui)         -- node{} (logging.west);
    \draw [arrow]  (logging)       -- node{} (reformulation.north);
    \draw [arrow]  (grammatical)   -- node{} (reformulation.south);

\end{tikzpicture}