Grouping in Definition Lists

Can anyone please tell me where we are with Grouping in Definition Lists
i.e. <di>

 

I have found a wiki entry that leaves me none the wiser here:

 

http://www.w3.org/html/wg/wiki/DefinitionGrouping

 

I have also found an inconclusive mail thread ending here:

 

http://lists.w3.org/Archives/Public/public-html/2007Jul/0080.html

 

 

I see that <di> is still in the xhtml 2 proposal.

 

I personally see a need for grouping purely for formatting with CSS but
agree rdf addresses grouping for data manipulation.

I know there were objections for legacy browsers but as this was discussed
in 2007 I wonder if that is still an issue?

 

Regards,

Dean Leigh