digraph G {

  URL="http://www.graphviz.org/doc/info/output.html"
  label=output
  lang [ URL="http://www.graphviz.org/doc/info/lang.html" ]
   colors [
  style=filled
  fillcolor=lightblue
  URL="http://www.graphviz.org/doc/info/output.html"
label=<<table href="http://www.graphviz.org/doc/info/colors.html"><tr><td BGCOLOR="green">colors</td></tr></table>>];

  subgraph cluster0 {
     style=filled
     fillcolor=yellow
     URL="http://www.graphviz.org/doc/info/arrows.html"
     label=arrows
     command [ style=filled
        fillcolor=grey
        URL="http://www.graphviz.org/doc/info/command.html" ]
     name [ URL="\G \N"]
  }
  lang ->  command [ URL="http://www.graphviz.org/doc/info/shapes.html" 
  ]
  lang -> colors [ URL="\E" edgetooltip=self ]
  lang -> size [ URL="headurl" edgetooltip=headurl headlabel=size headURL=headsize]
  word -> size [ URL="tailurl" taillabel=size tailURL=tailsize]
  word -> garf [ URL="labelurl" label=garf labelURL=garf]
  line -> all [ 
    URL="labelurl" 
    edgeurl="edgeurl" 
    edgetooltip=edgetooltip
    label=garf 
    labelURL=garf
    headURL=headURL
    headlabel=headlabel
    headtooltip=headtooltip
    tailURL=tailURL
    taillabel=taillabel
    tailtooltip=tailtooltip
  ]
}