RazorDocument - [0..9)::9 - [<input />]
    MarkupBlock - [0..9)::9
        MarkupTagHelperElement - [0..9)::9 - input[SelfClosing] - InputTagHelper1 - InputTagHelper2
            MarkupTagHelperStartTag - [0..9)::9
                MarkupTextLiteral - [0..9)::9 - [<input />] - Gen<Markup> - SpanEditHandler;Accepts:Any
                    OpenAngle;[<];
                    Text;[input];
                    Whitespace;[ ];
                    ForwardSlash;[/];
                    CloseAngle;[>];
