digraph world {
  rankdir=LR;

subgraph stepB {
  "xplanet" [ shape="diamond"];
  
  "itin-markers" -> "xplanet";
  "itin-arcs" -> "xplanet";
  "xplanet" -> "itin-map.png";

  itinKB2 [ label="itin.rdf"];

  cwm3 [ label="cwm", shape="diamond"];
  cwm4 [ label="cwm", shape="diamond"];
  itinKB2 -> cwm3;
  "itinMarks.n3" [ shape="parallelogram"];
  "itinMarks.n3" -> cwm3;
  cwm3 -> "itin-markers";
  itinKB2 -> cwm4;
  "itinArcs.n3" -> cwm4;
  "itinArcs.n3" [ shape="parallelogram"];
  cwm4 -> "itin-arcs";
}

subgraph stepA {

  cwm2 [ label="cwm", shape="diamond"];
  "itin.nt" -> cwm2;
  "airportLookup.n3" -> cwm2;
  "airportLookup.n3" [ shape="parallelogram"];
  "DAML airport data" -> cwm2
  cwm2 -> itinKB1;
  itinKB1 [ label="itin.rdf"];

}

}