The ‘interface’ node
% Title : The 'interface' node
% Author : George Ungureanu
% Category : tikz
\documentclass{standalone}
\usepackage{forsyde-tikz}
\begin{document}
\begin{tikzpicture}[]
\interface[] (if) <0,0> {sy}{sdf};
\node[anch] (a) at (if.e1) {}; \node[label, anchor=west] (l) at (a.east) {\texttt{if.e1}};
\node[anch] (a) at (if.w1) {}; \node[label, anchor=east] (l) at (a.west) {\texttt{if.w1}};
\end{tikzpicture}
\end{document}