Re: Absorbing Microdata

(Copying Sebastian explicitly)

Well...

I think having a document that states very clearly how the microdata information can be turned into RDF would be very good. That means that, on the API level, a parser can be used for microdata. I have no idea who would write such a document, though.

If there was a possibility to map an HTML5+Microdata file to a HTML5+RDFa file or, to put it another way, a DOM->DOM type transformation then that would of course be useful. This falls back to the conceptual hGRDDL approach of Ben, ie, defining preprocessing steps before running the RDFa processing; this may be then relatively simple to implement on top of existing RDFa processors. But I have no idea whether it is possible. 

Ivan

On Sep 15, 2010, at 05:19 , Manu Sporny wrote:

> Here's an interesting idea from Sebastian Heath via Twitter:
> 
>> sebastianheath: Has anybody thought about merging rdfa and microdata >
> via @itemprop? So that itemprop/property are interchangeable. #rdfa
>> #microdata
> 
> It's interesting because I can almost see an alternative document that
> tells RDFa processors how to interpret Microdata markup via the RDFa
> Processing rules. Note that this would be a document that is completely
> external to RDFa Core, XHTML+RDFa, and HTML+RDFa.
> 
> The preliminary updates to the processing rules in an external document
> that would allow this to happen are below. Here is the translation table
> from Microdata to RDFa:
> 
> Microdata        RDFa
> ---------        ----
> itemscope        typeof=""
> itemref          about="#ITEMREF_VALUE" or about="FULL_URI"
> itemtype         typeof="ITEMTYPE_VALUE" (OVERRIDES itemscope)
> itemprop         property="FULL_URI" or property="MODDED_ITEMPROP_VAL"
> 
> where MODDED_ITEMPROP_VAL is "http://www.w3.org/1999/xhtml/vocab#" +
> attribute value of itemprop.
> 
> There are still problems with nesting itemprops/itemscopes and the types
> that Microdata has specified for vcard, vevent and work... don't know if
> anybody else has looked at this yet. Just throwing it out there.
> 
> -- manu
> 
> -- 
> Manu Sporny (skype: msporny, twitter: manusporny)
> President/CEO - Digital Bazaar, Inc.
> blog: Saving Journalism - The PaySwarm Developer API
> http://digitalbazaar.com/2010/09/12/payswarm-api/
> 


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Ivan Herman, W3C Semantic Web Activity Lead
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