# Clickable links and mouse-over titles:
graph { linkbase: http://de.wikipedia.org/wiki/ }
node { autolink: label; autotitle: label; }

 [ Bonn ]
 [ Berlin ] { title: "Berlin (Capital)" }
 [ Kassel ] { autolink: none; }
 [ Ulm ] { link: "Stuttgart"; }
 [ Lahn ] { label: Ulm; }

# link         link, title overriden      only title
  [ Bonn ]  -> [ Berlin ]              -> [ Kassel ]
#              link overriden
  [ Bonn ]  -> [ Ulm ]
#              link goes to "Ulm" (label!)
  [ Ulm ]  -> [ Lahn ]