digraph GVmap {  
	label = "\n\nComposition data model"
	rankdir=TB
	
	node [ 
	  shape=tab
	  style=filled
	]
	subgraph cluster_packages {
	  label="Model"
	  rankdir=TB
      style=filled
      fillcolor="/set312/1"
	  
    "base" [
    URL="#base"
    label = "base"
    fillcolor="/set312/2"
    ] ;
    
	}
	
	node [
	shape=record
	fontsize=8
	style=filled] 
	"Composition:base.Wing" [
    URL="#base.Wing"
    label = "{base/Wing|+SerialNumber : ivoa:string\l}"
    fillcolor="/set312/2"
    ] ;
  "Composition:base.Airplane" [
    URL="#base.Airplane"
    label = "{base/Airplane|+SerialNumber : ivoa:string\l}"
    fillcolor="/set312/2"
    ] ;
  
 
    edge [color="blue", arrowhead="open", arrowtail="diamond",dir="both",fontsize="10"]
    "Composition:base.Airplane" -> "Composition:base.Wing" [headlabel="2",label="Wings",labelfontsize=10] ;
    
}