Microdata: itemid attribute (feedback)

Hello All

Just some thoughts on the itemid and the itemref attributes

I am unsure if itemid has any actual practical use (either that of I am 
misunderstanding something).

Itemid is used as a global Identifier for an Item, its value must be 
valid absolute url, what I am unsure of is how to actually use this? 
here is how I am guessing it should be used.

<div id="a"
     itemid="http://organization.com/#a"
     itemscope
     itemtype="http://microformats.org/profile/hcard">
    <a itemprop="url fn org" href="http://organization.com/">
      Example Oranization
    </a>
</div>

If this is correct then it seems a little like I am repeating data that 
already exists? itemid seems like it is just a long form version of the 
data available using id.  I do see  itemid as being useful for data that 
is *not* a url in the traditional sense, such as in the example that 
uses urn's

Thanks

-- 
Martin McEvoy

http://weborganics.co.uk/
Add to address book: http://transformr.co.uk/hcard/http://weborganics.co.uk/

Received on Saturday, 24 October 2009 15:38:13 UTC