The GraphML file format presents the native graph exchange format supported by yFiles for Silverlight.

Beyond the graph structure, graph exchange format GraphML also supports all visual attributes directly related to the representation of graph elements. In particular, this includes the styles for nodes, edges, ports, etc. which are defined by interfaces INodeStyle, IEdgeStyle, IPortStyle, etc. However, GraphML provides no direct support for further visual aspects like, e.g., zoom level, selection state, or a background image.