XGML is an XML-ish variant of the GML file format where sections and attributes as listed in the various tables of section GML File Format are wrapped in <section> and <attribute> tags, respectively.
Example 9.22, “XGML representation” shows the beginning of a file having "GML-over-XML" encoding.
Example 9.22. XGML representation
<section name="xgml">
<attribute key="Creator" type="String">yFiles</attribute>
<attribute key="Version" type="String">2.3.1</attribute>
<section name="graph">
<attribute key="hierarchic" type="int">1</attribute>
<attribute key="directed" type="int">1</attribute>
<section name="node">
<attribute key="id" type="int">0</attribute>
<section name="graphics">
<attribute key="x" type="double">200.0</attribute>
<attribute key="y" type="double">0.0</attribute>
</section>
<section name="LabelGraphics">
<attribute key="text" type="String">January</attribute>
</section>
</section>
...
</section>
An XGML file is written using class
XGMLIOHandler
which is a descendant of
GMLIOHandler and is used similarly to its superclass.
The code fragment in Example 9.23, “Instantiating an XGMLIOHandler” shows how to
instantiate an XGMLIOHandler and use it to write a graph to file.
XGMLIOHandler can be used with the Java 2 Runtime Environment beginning with version 1.4.
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