re 
mutually exclusive.
<P>
As an example of rounding, dot uses the graph
<XMP>
digraph R {
  rankdir=LR
  node [style=rounded]
  node1 [shape=box]
  node2 [fillcolor=yellow, style="rounded,filled", shape=diamond]
  node3 [shape=record, label="{ a | b | c }"]

  node1 -> node2 -> node3
}
</XMP>
to produce the figure<BR>
<IMG SRC=round.gif>
<DT><A NAME=d:dashed></A><TT>dashed</TT>
  <DD>This style causes the node's border to be drawn as a dashed line.
<DT><A NAME=d:dotted></A><TT>dotted</TT>
  <DD>This style