Port for drawing directed graphs?

[Olivier Nicole]

> > I am working on some software that must, as it's final output,  
> > produce a printout of a directed graph... nodes, connected by  
> > directed links.
> For manual work, xfig can be used, but I'm not sure if it can
> be "remote controlled" by a data file.

Sure can. I once had a script that generated an xfig input file and
was then generating the graph automatically.

The file format of xfig is plain text and quite simple.

Olivier