digraph positioning_process {
        layout=dot
        size="8,4"
        margin=0
        ratio=fill
        rankdir=LR
        edge [dir=right]

        node [style=filled]

        node [fillcolor="#ffaaaa"]
        edge [label=Request, color=red]
        InputMedium -> Input
        Input -> InputLogMedium

        node [fillcolor="#ffaaff"]
        Input -> Positioning
        Positioning -> PositioningAlgorithm

        node [fillcolor="#aaaaff"]
        edge [label=Result, color=blue]
        PositioningAlgorithm -> Positioning
        Positioning -> Output
        Output -> OutputStatistics
        Output -> OutputMedium
}