digraph classes {
    graph [rankdir=RL];
    node [shape=rect, style=filled, fontname=Sans, fontsize=10];
    edge [];

    /* Abstract classes */
    node [color="#9ec6e0", fontcolor="#000000"]
    Device;
    SPIDevice;
    AnalogInputDevice;
    MCP3xxx;
    MCP30xx;
    MCP32xx;
    MCP3xx2;
    MCP33xx;

    /* Concrete classes */
    node [color="#2980b9", fontcolor="#ffffff"];
    SPIDevice->Device;
    AnalogInputDevice->SPIDevice;
    MCP3xxx->AnalogInputDevice;
    MCP30xx->MCP3xxx;
    MCP32xx->MCP3xxx;
    MCP33xx->MCP3xxx;
    MCP3xx2->MCP3xxx;

    MCP3001->MCP30xx;
    MCP3002->MCP30xx;
    MCP3004->MCP30xx;
    MCP3008->MCP30xx;
    MCP3201->MCP32xx;
    MCP3202->MCP32xx;
    MCP3204->MCP32xx;
    MCP3208->MCP32xx;
    MCP3002->MCP3xx2;
    MCP3202->MCP3xx2;
    MCP3301->MCP33xx;
    MCP3302->MCP33xx;
    MCP3304->MCP33xx;
}