It is intended to provide benchmark data for various classes of graph drawing algorithms. Here are some widely used, publically available data sets:

• Test suites of directed and undirected graphs from the GDToolkit homepage (also known as the Rome Graphs)
• Graph Catalog (also known as the AT&T Graphs)
• directed graphs
• undirected graphs

In 2000, an effort to define GraphML, an XML-based data exchange format for graphs and graph drawings, was initiated.

The following data sets have been generated from the above collections. Each archive contains graphs with 10 to 100 nodes (see the included log file for additional statistics):

• Directed graphs (from the AT&T graphs)
• Undirected graphs (from the Rome graphs)
• Directed acyclic graphs (randomly generated)