The graphviz package
This library provides bindings for the Dot language used by the Graphviz (http://graphviz.org/) suite of programs for visualising graphs, as well as functions to call those programs.
Main features of the graphviz library include:
Almost complete coverage of all Graphviz attributes and syntax.
Support for specifying clusters.
The ability to use a custom node type.
Functions for running a Graphviz layout tool with all specified output types.
The ability to not only generate but also parse Dot code with two options: strict and liberal (in terms of ordering of statements).
Functions to convert FGL graphs and other graph-like data structures to Dot code - including support to group them into clusters - with a high degree of customisation by specifying which attributes to use and limited support for the inverse operation.
Round-trip support for passing an FGL graph through Graphviz to augment node and edge labels with positional information, etc.
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