<ditaa>
    +--------+   +-------+    +-------+
    |        | --+ dw1aa +--> |       |
    |  Text  |   +-------+    |diagram|
    |Document|   |!magic!|    |       |
    |     {d}|   |  c478 |    |       |
    +---+----+   +-------+    +-------+
        :                         ^
        |       Lots of work      :
        +-------------------------+
</ditaa>