A typical tool within this package is dot, which takes as input a (text file) graph description written in the DOT language. Such files are simply referred to as *.gv files. It can output graphs in a variety of formats.
Various people have written Perl wrappers around Graphviz:
It provides a small set of path analysis tools, after lexing and parsing *.gv files.
These tools are:
(a) Finding clusters
Here, a cluster is a set of nodes connected to each other, but not connected to any nodes outside the cluster.
(b) Finding all paths of a fixed length starting from a given node
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