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Graph::Writer::XML(3pm) User Contributed Perl Documentation Graph::Writer::XML(3pm)


Graph::Writer::XML - write out directed graph as XML


    use Graph;
    use Graph::Writer::XML;
    $graph = Graph->new();
    # add edges and nodes to the graph
    $writer = Graph::Writer::XML->new();
    $writer->write_graph($graph, 'mygraph.xml');


Graph::Writer::XML is a class for writing out a directed graph in a simple XML format. The graph must be an instance of the Graph class, which is actually a set of classes developed by Jarkko Hietaniemi.

The XML format is designed to support the Graph classes: it can be used to represent a single graph with a collection of nodes, and edges between those nodes. The graph, nodes, and edges can all have attributes specified, where an attribute is a (name,value) pair, with the value being scalar.



Constructor - generate a new writer instance.

    $writer = Graph::Writer::XML->new();

This doesn't take any arguments.


Write a specific graph to a named file:

    $writer->write_graph($graph, $file);

The $file argument can either be a filename, or a filehandle for a previously opened file.


Attribute values must be scalar. If they're not, well, you're on your own.


The perl module used to actually write out the XML. It handles entities etc.
Jarkko Hietaniemi's modules for representing directed graphs, available from CPAN under modules/by-module/Graph/
The O'Reilly book which has a chapter on directed graphs, which is based around Jarkko's modules.
The base-class for Graph::Writer::XML




Neil Bowers <>


Copyright (c) 2001-2012, Neil Bowers. All rights reserved. Copyright (c) 2001, Canon Research Centre Europe. All rights reserved.

This script is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

2021-09-19 perl v5.32.1