On Oct 2, 2005, at 8:48 PM, Steven Ellis wrote:

> Hi,
>
> I think that document fragments, whether they be structurally or  
> conceptually coherent, need to be permitted formal expression in  
> XHTML. The simplest illustration of this may be xhtml microformats.
>
> Bracing microformats (and other fragments) using globally unique  
> identifiers would permit machine isolation and analysis, cross  
> referencing, consensus, scriptability, coalescence, and the  
> association of folksonomies with high resolution.
>
> Please consider an attribute capable of accepting an arbitrary  
> 'unique concept / null concept' identifier.
>
> <div identity="3C05DC85-DC34-4546-9210-02EC43188367" id="MyCard"  
> class="hCard">Content</div>
>
> In this case 3C05DC85-DC34-4546-9210-02EC43188367 may achieve  
> consensus as an hCard microformat reference.  Can you speculate how  
> this will scale? I thought it good enough to share.

Personally, I think URLs + id attributes are enough.

(and this comes from someone heavily involved in microformat  
development).

-ryan