title: Graphviz for documentation
body: <p>I noticed that doxygen uses the graphviz library for creating diagrams. Have you ever used graphviz for generating documentation? Is it worth learning the graphviz for documentation purposes outside the scope of doxygen? Or am I better off to sticking with a standard data modeling package like Visio?</p>
  
  <p>I understand the merits of it as a graphing library, but for trying to represent more complex UML (or similar) is it still worth looking into?</p>