digraph "ManyClassAbstract" {
  rankdir="BT"
  node [ratio="auto" shape=record margin=0; href="javascript:Action.selectClass(&quot;\N&quot;);"];

  // Class: Student1
  "Student1" [shape=record, label="{Student1
&laquo;abstract&raquo;|name\ :\ String\l\
studentId\ :\ String\l}",
   tooltip="class Student1
"];

  // Class: Student2
  "Student2" [shape=record, label="{Student2}",
   tooltip="class Student2
"];
