documentationfor yFiles for HTML 2.6

The GraphML File Format

yFiles for HTML uses an extension of the GraphML format to serialize the contents of a GraphComponent. The format is XML based and describes the graph via XML elements such as <graph>, <node>, <edge>, and so on. Properties of the elements are described in <data> elements that use a certain key value to correlate them with a property.

While using the yFiles for HTML serialization mechanism provides many advantages and functionality out-of-the-box, it is not mandatory to use the GraphML file format for serialization.