You might want to look at Leon Brocard's GraphViz.pm module which is a Perl interface to the graphing tools of the GraphViz project. These tools are for generating directed and undirected graphs of which a tree can be considered a subset.

As part of the same project, you might also be interested in webdot which if a CGI program for generating graphs. There is an example of a tree on the webdot demo page.

Anyone else who is interested in this module should have a look at Leon's GraphViz.pm graphing tutorial which shows examples of graphing Perl data structures, XML, sub-routine cross references, code profiling, modules dependencies, op-codes and the Perl grammar!!

You are also use this module to graph Parse::RecDescent grammars and regexes and, as if that wasn't enough, there is also GraphViz::DBI for graphing database tables and relations and GraphViz::ISA for graphing the @ISA hierarchy.


John.
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