digraph TopLevel {
    compound = true
    bgcolor = lightcyan1
    fontname = Arial
    fontsize = 8
    label = "TopLevel"
    node [
        fontname = Arial,
        fontsize = 8,
        color = black
    ]

    CPMDisk [
        fontcolor = black,
        URL = "classes/CPMDisk.html",
        shape = ellipse,
        color = palegoldenrod,
        style = filled,
        label = "CPMDisk"
    ]

    DSK [
        URL = "classes/DSK.html",
        label = "DSK"
    ]

    DSK -> CPMDisk [

    ]

}