gistfile1.dot

digraph g {
  fontname = helvetica; fontsize = 10;

  node [shape = record; fontname = helvetica; fontsize = 10];
  edge [fontname = helvetica; fontsize = 10];
  
  /* Documents */
  
  doc0 [label = "<f0> parent_id|<f1> children|<f2> hierarchy|<f3> name|<f4> region"];
  doc1 [label = "<f0> parent_id|<f1> children|<f2> hierarchy|<f3> name|<f4> region"];
  doc2 [label = "<f0> parent_id|<f1> children|<f2> hierarchy|<f3> name|<f4> region"];
  
  /* Intra-doc */
  
  doc0:f1 -> doc0:f4;
  doc0:f2 -> doc0:f3;
  doc0:f2 -> doc0:f4;
  doc0:f3 -> doc0:f4;
  
  doc1:f1 -> doc1:f4;
  doc1:f2 -> doc1:f3;
  doc1:f2 -> doc1:f4;
  doc1:f3 -> doc1:f4;
  
  doc2:f1 -> doc2:f4;
  doc2:f2 -> doc2:f3;
  doc2:f2 -> doc2:f4;
  doc2:f3 -> doc2:f4;
  
  /* Links */
  
  doc0:f0 -> doc1:f1;
  doc1:f0 -> doc2:f1;
  doc2:f0 -> doc0:f1;
  
  /* Hierarchy */
  
  doc0:f2 -> doc1:f2 -> doc2:f2 -> doc0:f2;
}