GraphML is an XML-based file format for graphs.

Introduction to GraphML

Here is what a simple undirected graph with 2 nodes and one edge between them looks like:

<?xml version="1.0" encoding="UTF-8"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns"  
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
     http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
  <graph id="G" edgedefault="undirected">
    <node id="n0"/>
    <node id="n1"/>
    <edge id="e1" source="n0" target="n1"/>
  </graph>
</graphml>

Other Graph File Formats

• GXL, graph exchange format based on XML -- GXL
• Trivial Graph Format, simple text based format
• GML is another widely used graph exchange format. -- GML

• XGMML an XML-based graph markup language closely related to GML -- XGMML

See also

• XML
• Scalable Vector Graphics (SVG) is an XML-based graphics format.

External links

• http://graphml.graphdrawing.org/ homepage of GraphML
• http://graphml.graphdrawing.org/primer/graphml-primer.html An easy introduction to GraphML is the GraphML Primer.
• http://www.svgopen.org/2003/papers/ComparisonXML2SVGTransformationMechanisms/ Comparison between XML to SVG Transformation Mechanisms

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