graph G {
    compound="true"
    rankdir="TB"
    bgcolor="white"
    fontname="Tahoma"

    node [
        fixedsize="false"
        fontname="Tahoma"
        color="white"
        fillcolor="deepskyblue2"
        fontcolor="black"
        shape="box"
        style="filled"
        penwidth="1.0"
    ]
    edge [
        fontname="Arial"
        color="#00688b"
        fontcolor="black"
        fontsize="12"
        arrowsize="0.5"
        penwidth="1.0"
    ]




    "docs-rtd" -- "docs-rtd" [label=" 5 ", penwidth="5", color="#a0a0a0A5"];
    "hdk" -- "docs-rtd" [label=" 4 ", penwidth="4", color="#00688b93"];
    "hdk" -- "hdk" [label=" 4 ", penwidth="4", color="#a0a0a093"];
    "sdk" -- "sdk" [label=" 4 ", penwidth="4", color="#a0a0a093"];
    "sdk" -- "docs-rtd" [label=" 4 ", penwidth="4", color="#00688b93"];
    "sdk" -- "hdk" [label=" 3 ", penwidth="3", color="#00688b82"];

}