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today I have come to read some GraphML (basically just XML) files generated by yEd, and I have found many predefined elements such as UMLClassNode, Geometry, Fill... inside them. Unfortunately, I cannot seem to find any documentation regarding those elements on the Internet.

One more scenario is that when I save diagrams from Draw.IO as XML files, I find some particular MXGraph XML elements, but again, I cannot find their format anywhere. How should I look for these kinds of stuff?

Thank you for your time and consideration. I am looking forward to hearing from you.

Gia Thuan Lam
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1 Answers1

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GraphML, the XML representation format yEd uses for storing diagrams, is specified on it's official home page. yEd also uses yEd extension schemas, as the first couple text lines of an yEd-created .graphml file shows: 

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<graphml
 xmlns="http://graphml.graphdrawing.org/xmlns"
 xmlns:java="http://www.yworks.com/xml/yfiles-common/1.0/java"
 xmlns:sys="http://www.yworks.com/xml/yfiles-common/markup/primitives/2.0"
 xmlns:x="http://www.yworks.com/xml/yfiles-common/markup/2.0" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:y="http://www.yworks.com/xml/graphml"
 xmlns:yed="http://www.yworks.com/xml/yed/3"
 xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns
    http://www.yworks.com/xml/schema/graphml/1.1/ygraphml.xsd">
<!--Created by yEd 3.18.0.2-->
...

Documentation for the extension schemas is available from YWork's website. For example, the namespaces/schemas for "yfiles-common" are linked from https://www.yworks.com/products/yfiles/documentation, and the vocabulary for yEd's extensions to GraphML are documented at https://www.yworks.com/xml/schema/graphml/1.1/doc/http___www.yworks.com_xml_graphml/index.html .

imhotap
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