pres/img/appoverview.dot

   1 digraph {
   2 subgraph {
   3                 rank=same;
   4                 User -> Frontend
   5                 Frontend -> Backend
   6                 Backend -> Crawler [label="Crawler spec."]
   7                 Crawler -> Database [label="XML"]
   8         }
   9         Source -> Frontend
  10         Source -> Crawler
  11 }