RazorDocument - [0..3)::3 - [<!p]
    MarkupBlock - [0..3)::3
        MarkupElement - [0..3)::3
            MarkupStartTag - [0..3)::3 - [<!p] - Gen<Markup> - SpanEditHandler;Accepts:Any
                OpenAngle;[<];
                Bang;[!];
                Text;[p];
                CloseAngle;[<Missing>];
