digraph {
  graph [compound=true, rankdir=BT, ranksep=0.3];
	edge [penwidth=1.5];
	node [label="\N",
		penwidth=1.5
	];
  subgraph "cluster_com" {
		graph [label=<<TABLE BORDER="0"><TR><TD ALIGN="LEFT"><FONT POINT-SIZE="12">com</FONT></TD></TR><TR><TD ALIGN="LEFT"><FONT POINT-SIZE="10">(2015-02-06 12:55:32 UTC)</FONT></TD></TR></TABLE>>,
				labeljust=l,
				penwidth=0.5
		];

		"NSEC-0|example.com|DS" [color="#000000",
						fillcolor="#ffffff",
            label=<<TABLE COLOR="#000000" BORDER="0" CELLSPACING="-2" CELLPADDING="0" BGCOLOR="#ffffff"><TR>
<TD PORT="nsec1" BORDER="2"><FONT POINT-SIZE="6"> </FONT></TD>
</TR><TR><TD COLSPAN="1" BORDER="2" CELLPADDING="3"><FONT POINT-SIZE="12" FACE="Helvetica">NSEC</FONT></TD></TR>
</TABLE>>,
						shape=none,
						style=filled];
		"cluster_com_top" [shape=point, style=invis];
		"cluster_com_bottom" [shape=point, style=invis];
  }
  subgraph "cluster_example.com" {
		graph [label=<<TABLE BORDER="0"><TR><TD ALIGN="LEFT"><FONT POINT-SIZE="12">example.com</FONT></TD></TR><TR><TD ALIGN="LEFT"><FONT POINT-SIZE="10">(2015-02-06 12:55:32 UTC)</FONT></TD></TR></TABLE>>,
				labeljust=l,
				penwidth=0.5
		];

		"cluster_example.com_top" [shape=point, style=invis];
		"cluster_example.com_bottom" [shape=point, style=invis];
  }
	"cluster_com_bottom" -> "NSEC-0|example.com|DS" [style=invis];
	"cluster_example.com_top" -> cluster_com_bottom [color="#000000",
		dir=back,
		lhead=cluster_com,
		ltail="cluster_example.com",
		minlen=2,
		penwidth=5.0,
		style=solid];
	"cluster_example.com_top" -> "NSEC-0|example.com|DS" [color="#0a879a",
		dir=back,
		ltail="cluster_example.com",
		minlen=2,
		style=solid];
}
