Comment 8 for bug 170218

Some basic graph layout (a network of connectors in inkscape
is a "graph") functionality is now implemented. We support
a type of layout called "constrained force-directed layout".
 Basically, it tries to place shapes (graph nodes) joined by
connectors close together while keeping disconnected shapes
far apart. Constraints can be added to enforce special
requirements such as having connectors with end-markers
(arrows) point downwards, or to keep shapes from overlapping.

Many other drawing conventions can be supported by
constraints, I intend to add more user interface components
for specifying additional constraints as time goes on.