digraph G {
  "File" -> "TextFile";
  "File" -> "Image";
  "File" -> "ZIPFile";
  "File" -> "TARFile";
  "TextFile" -> "ConfigFile";
  "TextFile" -> "CSVFile";
  "TextFile" -> "XMLFile";

  // "File" -> "OfficeDocument";
  // "OfficeDocument" -> "OOFile";
  "ZIPFile" -> "OOFile";
  "OOFile" -> "ODFFile";
}
