HowtoDirectedGraphs has a basic howto on creating directed graphs using dot.
The below examples show some of the capabilities of the DirectedGraphPlugin
To view the dot input for this example, click the [dot] link located below the diagram.
You get: (simulated)
You get: (if installed)
Component architecture (inline SVG)
This is a typical example of a component architecture drawing (This kind of graph is also easy to do in Foswiki:Extensions.JHotDrawPlugin if you like the look but you prefer to draw it manually using your mouse).
Click the [dot] link located below the diagram to view the input. Note that this example is an inline SVG with fallback to PNG
You get: (simulated)
You get: (if installed)
Simple LAN setup (custom icons / shapefiles)
This type of graph can also easily be extended, for instance making network nodes clickable, pointing to asset databases or similar.
Click the [dot] link below the diagram to view the input.