The GraphWin (GW) File Format

The gw-format is the external graph format of GraphWin. It extends LEDA's graph format described in the previous section by additional parameters and attributes for describing graph drawings. Note that the gw-format was not defined to be a readable or easy to extend file format (in contrast to the GML format that is also supported by GraphWin).

Each gw file starts with a LEDA graph followed by a (possibly empty) layout section. An empty layout section indicates that no drawing of the graph is known, e.g. in the input file of a layout algorithm. If a layout section is given, it consists of three parts:

1. global parameters
2. node attributes
3. edge attributes