title: Graphviz: break flat but sparsely connected graph into multiple rows?
body: <p>Howto break a flat but sparsely connected graphviz graph into multiple rows? </p>
  
  <p>Graphviz yields a graph of about 4 ranks, but over 9000 nodes wide. However since the graph is sparsely connected we could break it in to rows, for example each 1000 nodes, and thus make it fit on nine rows one page. How can this be done?</p>
  
  <p>Not looking for unflatten, but rather something like line breaks in a text editor (is it clear what I am looking for?).</p>
  
  <p><strong>Edit:</strong> <a href="http://www.iam.unibe.ch/~akuhn/d/choco-old_version.pdf" rel="noreferrer">PDF with example graph here</a></p>