format.dot

digraph structs {
    node
        [ shape=record
        ];

    "header"
        [ label = "{ magic
                   | encryption seed
                   |
                      { encrypted
                      |
                          { file table size\l
                          | directory table size\l
                          | archive version\l
                          | header checksum\l
                          | file table checksum\l
                          | directory table checksum\l
                          | format version\l
                          }
                      }
                   }"
        , xlabel = "Header"
        ];
    "file table"
        [ label = "{ encrypted
                   }
                   |
                   { name\l
                   | file size\l
                   | entry size\l
                   | ?\l
                   | parent directory index\l
                   | ?\l
                   | compression method\l
                   | creation time\l
                   }"
        , xlabel = "File table"
        ];
    "directory table"
        [ label = "{ encrypted
                   }
                   |
                   { full path\l
                   | creation time\l
                   }"
        , xlabel = "Directory table"
        ];
    "file data"
        [ label = "File data"
        ];

    "header" -> "file table" -> "directory table" -> "file data";
}