digraph arch_wayland {
    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";
   ]

    c1 [label="Wayland Client"; URL="#c1"]
    c2 [label="Wayland Client"; URL="#c2"]

    comp [tooltip="Wayland Compositor" label="|{|Wayland\nCompositor|}|"; URL="#comp"]

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


    c1 -> comp [taillabel="③"; labeldistance=2.5; URL="#step_3"];
    c2 -> comp;

    comp -> c1 [label="②"; URL="#step_2"];
    comp -> c2;

    comp -> impl [xlabel = "④"; URL="#step_4"];
    comp -> impl [style = invis; label="    "];
    impl -> comp [xlabel = "①"; URL="#step_1"];

    c1 -> c2 [style=invis];
 }