DGML
Directed Graph Markup Language (DGML) is an XML-based file format for directed graphs. Introduction to DGML. Here is what a simple directed graph with three nodes and two links between them looks like <?xml version="1.0" encoding="utf-8"?> <DirectedGraph xmlns="http://schemas.microsoft.com/vs/2009/dgml"> </DirectedGraph> which looks like this: The complete XSD schema for DGML is available at . DGML not only allows describing nodes and links in a graph, but also annotating those nodes and links with any user defined property and/or category.