[Bug 13007] should (resolved) itemid be unique within a document?

http://www.w3.org/Bugs/Public/show_bug.cgi?id=13007

--- Comment #9 from Tab Atkins Jr. <jackalmage@gmail.com> 2011-06-21 16:18:13 UTC ---
(In reply to comment #8)
> (In reply to comment #7)
> > I think you've gotten yourself confused, Philip.  Two Microdata items with the
> > same @itemid are simply referring to the same abstract thing which exists
> > independently from the document.  It is not comparable with @id, which names a
> > particular element in the document.  You are just, say, creating two Microdata
> > items which both provide information about the same book.
> 
> This doesn't make sense.
> 
> If you are asserting that @itemid is used to refer to the same abstract thing,
> then shouldn't properties associated with that abstract thing be reflected when
> you retrieve that thing?

This is a completely separate issue from what Philip was talking about.

If you want multiple sets of properties to be reflected in a single Microdata
item, mark up one of the sets as an item and use @itemref to refer to the rest.
 There's no need to do magic coalescing here.

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Received on Tuesday, 21 June 2011 16:18:16 UTC