|  | digraph graphname { | 
|  | graph [fontname = "helvetica", fontsize=11]; | 
|  | node [shape="box", fontname = "helvetica", fontsize=11]; | 
|  |  | 
|  | subgraph cluster_ax_tree { | 
|  | label = "Accessibility Tree"; | 
|  |  | 
|  | a [label="Document"]; | 
|  | a -> b; | 
|  | b [label="Heading"]; | 
|  | b -> c; | 
|  | c [label="StaticText 'Sign In'"]; | 
|  | a -> d; | 
|  | d [label="TextBox 'Username'"]; | 
|  | a -> e; | 
|  | e [label="Button 'Submit'"]; | 
|  | } | 
|  |  | 
|  | subgraph cluster_ui_tree { | 
|  | label = "DOM Tree"; | 
|  |  | 
|  | A [label="<body>"]; | 
|  | A -> B; | 
|  | B [label="<h1>"]; | 
|  | B -> C; | 
|  | C [label="Sign In"]; | 
|  | A -> D; | 
|  | D [label="<input type='text'\nplaceholder='Username'>"]; | 
|  | A -> E; | 
|  | E [label="<input type='submit'>"]; | 
|  |  | 
|  | } | 
|  | } |