# A dot node
#
# Nodes can be created from scratch
# ~~~
# var node = new DotNode("id")
# node["label"] = "ID"
# ~~~
# Then added to a graph
# ~~~
# var graph = new DotGraph("G", "digraph")
# graph.add node
# ~~~
# Or can be created directly from an existing graph
# ~~~
# var node2 = graph.add_node("id2")
# node2["label"] = "ID2"
# ~~~
class DotNode
	super DotElement
end