Graphviz dot language - drawing a single disconnected node/vertex?

Question

I've been Googling for this for quite a while and yet I couldn't find anything. How do I draw a graph with Graphviz that has no vertices connected to it?

Answer 1

Like this:

digraph g {
  SingleNode;
}

Simply do not define any edges connecting the node to other nodes (SingleNode -> OtherNode).