digraph G {
  ordering=out;

  fs [label="filesystem\nchangeset", shape=folder, href="https://github.com/opencontainers/image-spec/blob/master/layer.md"];
  configuration [label="image\nconfig", shape=hexagon, href="https://github.com/opencontainers/image-spec/blob/master/config.md#properties"];

  tar [shape=rect];
  gzip [shape=rect];
  tee [shape=rect];
  tee2 [label=tee, shape=rect];
  tee3 [label=tee, shape=rect];
  sha256sum [shape=rect];
  sha256sum2 [label=sha256sum, shape=rect];
  sha256sum3 [label=sha256sum, shape=rect];
  curl [shape=rect];
  curl2 [label=curl, shape=rect];
  curl3 [label=curl, shape=rect];
  wc [label="wc -c", shape=rect];
  wc2 [label="wc -c", shape=rect];

  config [label="config file", shape=note, href="https://github.com/opencontainers/image-spec/blob/master/config.md"];
  layer [shape=note, href="https://github.com/opencontainers/image-spec/blob/master/layer.md"];
  manifest [shape=note, href="https://github.com/opencontainers/image-spec/blob/master/manifest.md"];

  registry [shape=cylinder, href="https://github.com/opencontainers/distribution-spec/blob/master/spec.md"];

  config_size [label="config size"];
  layer_size [label="layer size"];
  config_digest [label="config digest\n(image id)", href="https://github.com/opencontainers/image-spec/blob/master/config.md#imageid"];
  layer_digest [label="layer digest"];

  diffid [href="https://github.com/opencontainers/image-spec/blob/master/config.md#layer-diffid"];

  configuration -> config;
  fs -> tar;

  tar -> tee;
  tee -> sha256sum;
  sha256sum -> diffid [style=dashed];
  tee -> gzip;
  gzip -> layer;
  layer -> tee2;
  tee2 -> sha256sum2;
  sha256sum2 -> layer_digest [style=dashed];
  tee2 -> wc;
  wc -> layer_size [style=dotted];
  layer_size -> manifest [style=dotted];
  tee2 -> curl;

  curl -> registry;

  diffid -> config [style=dashed];
  config -> tee3;
  tee3 -> curl2;
  curl2 -> registry;

  tee3 -> wc2;
  tee3 -> sha256sum3;
  wc2 -> config_size [style=dotted];
  sha256sum3 -> config_digest [style=dashed];

  config_digest -> manifest [style=dashed];
  config_size -> manifest [style=dotted];
  layer_digest -> manifest [style=dashed];
  manifest -> curl3;
  curl3 -> registry;
}