User Request Flow (DITAA)

      +--------+
      |        |
      |  User  |
      |        |
      +--------+
          ^
  request |
          v
  +------------+
  |            |
  |   Capable  |
  |            |----+
  +------------+    |
       ^  ^         | inflate
       |  |         |
       v  +---------+
  +-------------+
  |             |
  |    Ditaa    |
  |             |----+
  +-------------+    |
             ^       | process
             |       |
             +-------+