`sig
type t = [ `Option ]
type form = [ `Form ]
type formctrl_sans_label = [ `Button | `Input | `Select | `Textarea ]
type formctrl = [ `Button | `Input | `Label | `Select | `Textarea ]
type block = XHTML.T.FORMS.form
type inline_sans_label = XHTML.T.FORMS.formctrl_sans_label
type inline = XHTML.T.FORMS.formctrl
type flow_sans_label = [ `Button | `Form | `Input | `Select | `Textarea ]
type flow = [ `Button | `Form | `Input | `Label | `Select | `Textarea ]
end`