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Re: Microdata: The Itemref element

From: Philip Jägenstedt <philipj@opera.com>
Date: Mon, 19 Oct 2009 18:21:37 +0200
To: "Tab Atkins Jr." <jackalmage@gmail.com>, "Leif Halvard Silli" <xn--mlform-iua@xn--mlform-iua.no>
Cc: "Olivier GENDRIN" <olivier.gendrin@gmail.com>, "Nicholas Stimpson" <nicholas.stimpson@ntlworld.com>, public-html@w3.org
Message-ID: <op.u112ebxqatwj1d@sisko.linkoping.osa>
On Mon, 19 Oct 2009 18:11:14 +0200, Tab Atkins Jr. <jackalmage@gmail.com>  
wrote:

> On Mon, Oct 19, 2009 at 10:55 AM, Leif Halvard Silli
> <xn--mlform-iua@xn--mlform-iua.no> wrote:
>> Despite the error, what Olivier pointed out is that Microdata has a  
>> problem
>> similar to what has been claimed about RDFa. For RDFa, the table  
>> example was
>> made a lot of fuzz about by Jon and others: did the algorithm take into
>> account where things landed in the DOM or not? Fortunately, though, RDFa
>> only operates with attributes. And so, as long as you take account of  
>> the
>> DOM - which is quite simple, you should be safe. Whereas for Microdata,  
>> it
>> seems one must think much more about the DOM all the time and use
>> workarounds. (We can't sit with the Live DOM Viewer all the time ...)
>
> Yeah, I agree.  Having to workaround this stuff is pretty annoying.
> The only real problem with making itemref an attribute on the
> @itemscope element is that it prevents chained itemrefs, as brought up
> previously (where the main microdata blob has an itemref to another
> element, which contains some itemprops and another itemref to a third
> element).
>
> This doesn't prevent you from expressing anything, as you can always
> just write all the referred-to ids directly in the @itemref attribute,
> but it might be annoying in some cases.  If it's not a big deal,
> though, then it's probably not a problem to change.

Indeed. Can anyone figure out a proper example that actually needs to  
chain the references? A single @itemref attribute on the @itemscope'd  
element isn't the only option (although the one I like best so far).

-- 
Philip Jägenstedt
Core Developer
Opera Software
Received on Monday, 19 October 2009 16:22:19 GMT

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