A bit of colour always shows a program’s structure in a better light. Green for the backup program, orange and blue for high-level and low-level journal manipulation, and yellow for link creation.
As well as automatic colouring by namespace, there are options to control whether use- and define- edges are shown, and whether nodes in each namespaces are grouped together. For instance, instead of drawing define-edges between namespaces and their members as above, we could omit those edges and instead group them. The “fdp” layout algorithm seems to render best for this graph:
Juha’s colour and grouping enhancements are implemented for the GraphViz output. pyan also outputs .tgf files for yEd. But “trivial graph format” is just too trivial to support these options, so I may soon extend the program to write the more advanced .graphml format.