reificazione_attributo.tex

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows.meta}
\begin{document}
\begin{tikzpicture}
    \draw

    %%* Attributi:
    %%  node[draw, circle, inner sep=1pt, fill=black]{}node[right]{\footnotesize A}
    %%? Distanza orizzontale: E -(0.25,0.x)- A
    %%? Distanza verticale: E -(0,x * 0.22)- A

    %%* Cardinalità:
    %%  node[below right]{\scriptsize $(0,N)$}
    %%  node[above right]{\scriptsize $(0,N)$}
    %%  node[midway, above]{\scriptsize $(0,N)$}

    %%* Relazione:
    %%  node[draw, diamond, shape aspect=2, inner sep=3pt, anchor=90](r1){}
    %%  node[draw, diamond, shape aspect=2, inner sep=0.2pt, anchor=180](r2){R2}

    %%* Entità:
    %%  node[draw, rectangle, anchor=90](e1){}
    %%? Distanza verticale: E -(0.3)- R -(0.3) E
    %%? Distanza orizzontale: E -(0.75)- R -(0.75)- E

    (0,0)node[draw, rectangle, anchor=90](e1){Entità}
    (e1.110)--++(0,0.66)node[draw, circle, inner sep=1pt, fill=black]{}node[right]{\footnotesize Attributo 1}
    (e1.90)--++(0,0.44)node[draw, circle, inner sep=1pt, fill=white]{}node[right]{\footnotesize Attributo 2}
    (e1.70)--++(0,0.22)node[draw, circle, inner sep=1pt, fill=white]{}node[right]{\footnotesize Attributo 3}


    (0,-1.5)node[draw, diamond, shape aspect=2, inner sep=0.2pt, anchor=90](r1){\small E-A}
    (r1.180)--++(-0.65,0)node[draw, rectangle, anchor=0](e1){Entità}
    (e1.100)--++(0,0.44)node[draw, circle, inner sep=1pt, fill=black]{}node[right]{\footnotesize Attributo 1}
    (e1.80)--++(0,0.22)node[draw, circle, inner sep=1pt, fill=white]{}node[right]{\footnotesize Attributo 2}
    (r1.0)--++(0.65,0)node[draw, rectangle, anchor=180](e1){Attributo 3}
    (e1.100)--++(0,0.44)node[draw, circle, inner sep=1pt, fill=black]{}node[above]{\footnotesize Attributo 4}

    ;
\end{tikzpicture}
\end{document}