Graph-ReadWrite

This is a collection of perl classes for reading and writing directed graphs in a variety of file formats. The graphs are represented in Perl using Jarkko Hietaniemi’s Graph classes. Version 2+ of this distribution works with version 0.5 and later of the Graph distribution.

There are two base classes:

Graph::Reader
Base class for classes which read a graph
file and create an instance of the Graph class.

Graph::Writer
Base class for classes which take an instance of the
Graph class and write it out in a specific file format.

This distribution also defines a simple XML format for storing directed graphs, defined to meet the needs of the Graph class. A reader and writer are provided for this:

Graph::Reader::XML
Graph::Writer::XML

Writers are also included for Dot, VCG, and daVinci, two packages for displaying / rendering graphs. Dot and VCG are freely available; daVinci is freely available at the moment, but that is going to change soon.

Graph::Writer::Dot
Graph::Writer::VCG
Graph::Writer::daVinci

A reader for Dot files has been contributed by Mark Hillebrand:

Graph::Reader::Dot

A reader and writer for HTK lattices are also included:

Graph::Reader::HTK
Graph::Writer::HTK

These last two will probably only be of interest to people working with HTK, or tools which use the same format.

Dependencies: Graph Jarkko’s Graph classes XML::Parser used by Graph::Reader::XML XML::Writer used by Graph::Writer::XML IO::File

To install these modules, you should just have to run the following:

% perl Makefile.PL
% make
% make test
% make install

This distribution contains an early version of a test-suite; you may get a warning about an undefined value from one of the tests.

Bugs, suggestions, and new readers and writers will be gratefully received.

Neil Bowers neil@bowers.com