\def\fileversion{v0.1}
\def\filedate{2017/03/29}

\usetikzlibrary{arrows.meta}
\usetikzlibrary{shadows}
\usetikzlibrary{shapes.geometric}

\pgfdeclareshape{rectification}{
   \inheritsavedanchors[from=circle]
   \inheritanchorborder[from=circle]
   \inheritanchor[from=circle]{center}
   \inheritanchor[from=circle]{north}
   \inheritanchor[from=circle]{south}
   \inheritanchor[from=circle]{west}
   \inheritanchor[from=circle]{east}
   \backgroundpath{
       \pgfsetarrows{-}
       \pgfpathcircle{\pgfpoint{0}{0}}{\radius} \pgfusepath{stroke,clip}
       \pgfpathmoveto{\pgfpoint{-\radius}{-0.25 * \radius}}
       \pgfpathlineto{\pgfpoint{0}{-0.25 * \radius}}
       \pgfpathlineto{\pgfpoint{\radius}{\radius - 0.25 * \radius}}
   }
}

\tikzset{
   nef/.style={
       minimum width=1.5em, minimum height=1.5em,
       every path/.style={>=Latex},
       graphs/every graph/.style={grow right sep=15mm, branch down sep=15mm, nodes={anchor=center}, edge quotes={above, node font=\footnotesize}},
   },
   ext/.style={draw=none},
   net/.style={draw, rounded corners=0.5em},
   ens/.style={draw, circle, inner sep=0.25ex},
   pnode/.style={draw, circle, fill=black, minimum width=0.75em, minimum height=0.75em},
   rect/.style={draw, shape=rectification, inner sep=0.25ex},
   ea/.style={draw, fill=white, circle, inner sep=0.05em, double copy shadow={opacity=0.6, shadow yshift=-0.3ex, shadow xshift=0.3ex}},
   recurrent/.style={loop above, min distance=2em, in=120, out=60},
   inhibit/.style={-Circle},
   modulatory/.style={-{Arc Barb[reversed]}}
}

\endinput

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