Re: [office] Re: [office-accessibility] Re: [office] Proposal forRadio Button grouping

As Duane points out, the issue of contradicting group definitions could be 
resolved by defining a resolution mechanism.  But before we go down that 
road, I'd like to see whether this new way of defining radio button groups 
in fact adds any expressivity to ODF, or is it merely an equivalent method 
of defining groups.  I'm not a big fan of adding features twice.  It is 
hard enough adding them once.

So my questions are:

1) Do we have a problem with radio button accessibility in ODF 1.1? 
2) If so, does this proposal address that problem?
3) If not, is this proposal allow implementations to express something 
that cannot already be expressed by the existing grouping mechanism?
4) If so, what new does it allow implementations to express?