digraph systemDiagram {
  # Install graphviz and run `fdp -Tpng system.dot -o system_diagram.png`
  subgraph cluster_0 {
    label="System Diagram";
    node [shape=record];
    registrant [label="Registrant"];
    subgraph cluster_cloud {
      label="cloud.gov";
      node [shape=record];
      postgres [label="Postgres Database"];
      subgraph cluster_django {
        label="Django MVC";
        node [shape=record];
        models [pos="0,1!" label="Database ORM"];
        views [pos="1,.5!" label="Views"];
        templates [pos="1,0!" label="Templates"];
      }
    }
    registrant -> views [dir=both];
    models -> postgres [dir=both];
  }
}