<choices> without attributes ?

Hi,

you wrote in the Draft from 8/6/01, chapter 7.13.2.6 choices:
"This element is used within list form controls to group items. This provides the same functionality as element optgroup in HTML 4.0. "


I think there should be a attribute "label" for each <choices> for rendering like follows:

XForms:
<choices label="A">
    <item/>
    <item/>
</choices>
<choices label="B">
    <item/>
    <choices label="C">
        <item/>
    </choices>
</choices>

rendered:
optgroup A->item1
                ->item2
optgroup B->item1
                ->optGroupC->item1
                ......


Greetings,
Martin Nussbaumer