digraph {
  compound=true;
  rankdir="LR";
  ordering = out;

  subgraph cluster_tarball {
    label = "image.tar";

    subgraph cluster_manifest {
      label = "manifest.json";

      mconfig [label="Config", shape="rect"];
      layers [label="Layers", shape="rect"];
      sources [label="LayerSources", shape="rect"];
      tags [label="RepoTags", shape="rect"];
    }

    config [shape="note"];

    mconfig -> config [label="image id"];

    layers -> l1 [lhead=cluster_layer1, label="layer digest"];
    layers -> l2 [lhead=cluster_layer2, label="layer digest"];

    config -> l1 [label="diffid"];
    config -> l2 [label="diffid"];

    sources -> l1 [label="diffid"];
    sources -> l2 [label="diffid"];

    subgraph cluster_layer1 {
      label = "layer.tar.gz";
      margin = 20.0;
      l1 [label="layer.tar", shape="folder"];
    }

    subgraph cluster_layer2 {
      label = "layer.tar.gz";
      margin = 20.0;
      l2 [label="layer.tar", shape="folder"];
    }
  }
}