Create node in graphviz using polygon as icon and text label

Question

Is there any way to create a node in Graphviz that looks like the below? (Placing a hexagon and text side by side inside the node instead of just placing text inside box)

Answer 1

You can't easily embed nodes within other nodes, but you can insert images into nodes. Create an image (or images) with the polygon shape(s) and insert them into an HTML-style node (record-style would probably also work).
Like so:

digraph i{
 {rank=same
  n1 [shape=plaintext,label=<
  <TABLE CELLSPACING="0" CELLPADDING="0" BORDER="1" cellborder="0"> 
  <TR><TD FIXEDSIZE="true" height="20" width="20"><IMG  SRC="cow.png" scale="true"/></TD><TD>some text</TD></TR>
  </TABLE>
  >
  ]

  n2 [shape=plaintext,label=<
  <TABLE CELLSPACING="0" CELLPADDING="0" BORDER="1" cellborder="0" >
  <TR><TD colspan="2" bgcolor="green1">Step</TD></TR>
  <TR><TD FIXEDSIZE="true" height="20" width="20"><IMG  SRC="cow.png" scale="true"/></TD><TD>some text</TD></TR>
  </TABLE>
  >
  ]
  n1 -> n2
  }
} 

Giving: