digraph calls {

  load [label="load.pl"];
  dcg  [label="regex.dcg.pl"];
  readxsd     [label="readxsd.pl"];
  parseregex  [label="parseregex.pl"];

  load -> dcg;
  load -> readxsd;
  load -> parseregex;
 
  g_opts [label="g_opts.pl"]; 
  guards [label="guards.pl"]; 
  lookahead [label="lookahead.dcg.pl"]; 

  dcg -> g_opts;
  dcg -> guards;
  dcg -> lookahead;

  readxsd -> parseregex;
  parseregex -> dcg;
  parseregex -> g_opts;

  ast [label="ast.pl"];
  recognize [label="recognize.pl"];

  recognize -> dcg;
  recognize -> g_opts;

  
}