The dot language has a URL attribute for graphviz nodes that allow linking to other objects (i.e. Drupal nodes or call for taxonomy related nodes)
How can we can open a new window on click on a Graphviz node instead of replacing the graphic itself?

addNode($term->name, array('URL' => url('taxonomy/term/' . $term->tid)));

which produces a link that brings to a list of nodes for the given term

How this should be modified to include for example a "_blank" target? (if possible)

Thanks