dos dibujos tikz interfiriendo

dos dibujos tikz interfiriendo

Esta es una pregunta muy específica sobre dos objetos de dibujos tikz. El primero muestra esto:

diagrama de caso de usoextendereincluir

El segundo es de esta discusión:ERM pata de gallo en una forma agradable

Tengo que cambiar la configuración tikset{o tikzpicture{para que ambos funcionen.

este es un MWE:

\documentclass{article}
\usepackage{array}
\renewcommand{\arraystretch}{1.1}
\usepackage{tikz}
\usetikzlibrary{shapes.multipart}
\usetikzlibrary{positioning}
\usetikzlibrary{shadows}
\usetikzlibrary{calc}

% code for "one to omany", etc. is taken from https://tex.stackexchange.com/q/141797/101651
\makeatletter
\pgfarrowsdeclare{crow's foot}{crow's foot}
{
    \pgfarrowsleftextend{+-.5\pgflinewidth}%
    \pgfarrowsrightextend{+.5\pgflinewidth}%
}
{
    \pgfutil@tempdima=0.6pt%
    %\advance\pgfutil@tempdima by.25\pgflinewidth%
    \pgfsetdash{}{+0pt}%
    \pgfsetmiterjoin%
    \pgfpathmoveto{\pgfqpoint{0pt}{-9\pgfutil@tempdima}}%
    \pgfpathlineto{\pgfqpoint{-13\pgfutil@tempdima}{0pt}}%
    \pgfpathlineto{\pgfqpoint{0pt}{9\pgfutil@tempdima}}%
    \pgfpathmoveto{\pgfqpoint{0\pgfutil@tempdima}{0\pgfutil@tempdima}}%
    \pgfpathmoveto{\pgfqpoint{-8pt}{-6pt}}% 
    \pgfpathlineto{\pgfqpoint{-8pt}{-6pt}}%  
    \pgfpathlineto{\pgfqpoint{-8pt}{6pt}}% 
    \pgfusepathqstroke%
}

\pgfarrowsdeclare{omany}{omany}
{
    \pgfarrowsleftextend{+-.5\pgflinewidth}%
    \pgfarrowsrightextend{+.5\pgflinewidth}%
}
{
    \pgfutil@tempdima=0.6pt%
    %\advance\pgfutil@tempdima by.25\pgflinewidth%
    \pgfsetdash{}{+0pt}%
    \pgfsetmiterjoin%
    \pgfpathmoveto{\pgfqpoint{0pt}{-9\pgfutil@tempdima}}%
    \pgfpathlineto{\pgfqpoint{-13\pgfutil@tempdima}{0pt}}%
    \pgfpathlineto{\pgfqpoint{0pt}{9\pgfutil@tempdima}}%
    \pgfpathmoveto{\pgfqpoint{0\pgfutil@tempdima}{0\pgfutil@tempdima}}%  
    \pgfpathmoveto{\pgfqpoint{0\pgfutil@tempdima}{0\pgfutil@tempdima}}%
    \pgfpathmoveto{\pgfqpoint{-6pt}{-6pt}}% 
    \pgfpathcircle{\pgfpoint{-11.5pt}{0}} {3.5pt}
    \pgfusepathqstroke%
}

\pgfarrowsdeclare{one}{one}
{
    \pgfarrowsleftextend{+-.5\pgflinewidth}%
    \pgfarrowsrightextend{+.5\pgflinewidth}%
}
{
    \pgfutil@tempdima=0.6pt%
    %\advance\pgfutil@tempdima by.25\pgflinewidth%
    \pgfsetdash{}{+0pt}%
    \pgfsetmiterjoin%
    \pgfpathmoveto{\pgfqpoint{0\pgfutil@tempdima}{0\pgfutil@tempdima}}%
    \pgfpathmoveto{\pgfqpoint{-6pt}{-6pt}}% 
    \pgfpathlineto{\pgfqpoint{-6pt}{-6pt}}%  
    \pgfpathlineto{\pgfqpoint{-6pt}{6pt}}% 
    \pgfpathmoveto{\pgfqpoint{0\pgfutil@tempdima}{0\pgfutil@tempdima}}%
    \pgfpathmoveto{\pgfqpoint{-8pt}{-6pt}}% 
    \pgfpathlineto{\pgfqpoint{-8pt}{-6pt}}%  
    \pgfpathlineto{\pgfqpoint{-8pt}{6pt}}%    
    \pgfusepathqstroke%
}
\makeatother

\tikzset{%
    arrow/.style={-stealth},
    %Define style for boxes around first tikzpicture
    punktblue/.style={ % <-- see here is no args as below
           rectangle,
           rounded corners,
           draw=blue, very thick,
           text centered},
    punktred/.style={
           rectangle,
           rounded corners,
           draw=red, very thick,
           %text width=6.5em,
           %minimum height=2em,
           text centered},        
    pics/entity/.style n args={3}{code={%  <-- see here are more definitions then above
            \node[draw, blue,
            shade, top color=white, bottom color=blue!30,
            drop shadow={gray!70,
                shadow xshift=3pt,
                shadow yshift=-3pt,
                rounded corners},  
            rounded corners,  
            font=\ttfamily\footnotesize, 
            rectangle
            ] (#1)
            {\color{black}\begin{tabular}{>{\raggedright\arraybackslash}p{4.5em}>{\raggedleft\arraybackslash}p{6em}}
                    #3
                \end{tabular}
            };%
            \node[font=\ttfamily\footnotesize,
            text height=1.5ex,text depth=.25ex,
            above =0pt of #1
            ] 
            {#2};%
    }},
    pics/entitysimple/.style n args={3}{code={%
            \node[draw, rounded corners,             
            rectangle split,
            rectangle split parts=2,
            font=\ttfamily\footnotesize,
            text height=1.5ex,text depth=.25ex
            ] (#1)
            {#2 \nodepart{second} 
                \begin{tabular}{>{\raggedright\arraybackslash}p{4.5em}>{\raggedleft\arraybackslash}p{6em}}
                    #3
                \end{tabular}
            };%
    }},
    zig zag to/.style={
        to path={(\tikztostart) -| ($(\tikztostart)!#1!(\tikztotarget)$) |- (\tikztotarget)}
    },
    zig zag to/.default=0.5,   
    one to one/.style={
        one-one, zig zag to
    },    
    one to many/.style={
        one-crow's foot, zig zag to,
    },
    one to omany/.style={
        one-omany, zig zag to
    },      
    many to one/.style={
        crow's foot-one, zig zag to
    },
    many to many/.style={
        crow's foot-crow's foot, zig zag to
    }, 
}
\begin{document}
%this is the first part that doesn't work since i added the second part
    \begin{tikzpicture}[node distance=0cm, auto,]
      \node[punktblue,inner sep=5pt] (A) {A};
      \node[punktred,inner sep=5pt,right=2cm of A] (B) {B};
      \node[right=of A] (t) {\footnotesize include}  edge[arrow, bend left=0] (B.west); %<-- if you comment out this line it works.
    \end{tikzpicture}
% this is the second part i added:
    \begin{center}
        \begin{tikzpicture}
        \pic {entitysimple={empl}{Employee}{%
                Username: & \textcolor{red}{(PK)} \\
                Password: & varchar(255) \\        
                Name: & varchar(255) \\
                LastName: & varchar(255) \\ 
        }};
        \pic[right=7em of empl] {entitysimple={stud}{Student}{%
                Username: & \textcolor{red}{(PK)} \\
                Password: & varchar(255) \\        
                Name: & varchar(255) \\
                LastName: & varchar(255) \\ 
        }};
        \pic[below=12ex of stud] {entitysimple={thesis}{Thesis}{%
                Title: & \textcolor{red}{(PK)} \\
                Year: & numeric(4) \\        
        }};
        \draw[one to omany] (empl.east) -- node[above]{\footnotesize\texttt{teaches}} (stud.west);
        \draw[one to one] (stud.south) -- node[left]{\footnotesize\texttt{writes}} (thesis.north);
        \draw[one to many] (empl.south) |- node[left, yshift=44pt, xshift=-2pt] {\footnotesize\texttt{supervises}} (thesis.west);
        \end{tikzpicture}
    \end{center}        
\end{document}

¿Cómo puedo cambiar la primera parte para que ambas funcionen?

Editar: Parece que hay otro problema que no puedo reproducir con el MWE. Esta es una captura de pantalla del código de error. No tengo idea de dónde está Thinspce (U+2009)... El manual de entrada tampoco muestra más información útil en la página 4. (o no veo el significado...) Se agradece cualquier ayuda...

captura de pantalla

Respuesta1

La primera parte da un error, con o sin la segunda parte, porque la clave arrowno está definida.

Añade la línea

\tikzset{arrow/.style={-stealth})

al preámbulo.

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