digraph arch_x {
    edge[
        fontname="DejaVu Sans";
        dir="both";
        arrowtail="dot";
        arrowsize=.5;
        fontname="DejaVu Sans"
        fontsize="18";
    ]

    node[
        shape="Mrecord";
        color=none;
        fillcolor="#ffbc00";
        style="filled";
        fontname="DejaVu Sans"
        fontsize="18";
    ]

    {
        rank=same;
        c1 [label="X Client"; URL="#c1"]
        c3 [label="X Client"; URL="#c3"]
    }
    c2 [label="X Client"; URL="#c2"]

    {
        rank=same;
        xserver [tooltip="X Server" label="|{|X Server|}|"; URL="#xserver"]
        comp [tooltip="Compositor" label="|{|Compositor|}|"; URL="#comp"]
    }

    impl [tooltip="KMS evdev Kernel" label="|{{KMS|evdev}|Kernel}|"; URL="#impl"]

    c1 -> xserver [taillabel="③"; labeldistance=2; URL="#step_3"];
    c2 -> xserver;
    c3 -> xserver;

    xserver -> c1 [taillabel="②"; labeldistance=2; URL="#step_2"];
    xserver -> c2;
    xserver -> c3;

    xserver -> impl [taillabel = "⑥"; labeldistance=1.75; URL="#step_6"];
    xserver -> impl [style = invis; label="    "];
    impl -> xserver [taillabel = "①"; labeldistance=1.75; URL="#step_1"];

    xserver -> comp [style=invis];
    xserver -> comp [taillabel="④"; labeldistance=1.75; labelangle=-45; URL="#step_4"];
    comp -> xserver [taillabel="⑤"; URL="#step_5"];
    comp -> xserver [style=invis]

    c1 -> c2 [style=invis];
    c3 -> c2 [style=invis];
 }