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Re: Parsing Microdata into RDF Graphs: URI Comparison

From: Martin Hepp <martin.hepp@ebusiness-unibw.org>
Date: Mon, 31 Oct 2011 09:07:33 +0100
Cc: W3C Semantic Web IG <semantic-web@w3.org>, HTML Data Task Force WG <public-html-data-tf@w3.org>, W3C LOD Mailing List <public-lod@w3.org>
Message-Id: <D96B3849-1DCF-4ACB-9C04-076DD9E87EC6@ebusiness-unibw.org>
To: Ivan Herman <ivan@w3.org>
Hi Ivan:
Frankly, I don't know. In general, if URIs are used as identifiers, the amount of canonicalization should be

1. limited to a minimum and
2. the same for Microdata/HTML, XML, and RDF.

It can be fixed at either end, IMO.

Martin

On Oct 29, 2011, at 6:05 PM, Ivan Herman wrote:

> Martin, 
> 
> I must admit I did not follow all the intricacies of the relative URI->full URI conversion, I usually rely on library functions (I know, I am lazy). But if what you say below is true, isn't that a bug in the microdata spec?
> 
> Ivan
> 
> On Oct 29, 2011, at 11:26 , Martin Hepp wrote:
> 
>> Dear all:
>> 
>> We had a longer discussion on URI comparison in RDF settings earlier this year. Note that when it comes to writing Microdata parsers, which will be a common thing for LOD architectures, there is a new spec to observe:
>> 
>>  http://www.whatwg.org/specs/web-apps/current-work/multipage/urls.html#resolve-a-url
>> 
>> AFAIK, itemtype URIs are never resolved this way, but itemprop and href URIs will.
>> 
>> This may result to different behaviors of queries in RDF settings if the same markup is used in Microdata vs. RDFa.
>> 
>> Best
>> 
>> Martin Hepp
>> 
>> 
>> --------------------------------------------------------
>> martin hepp
>> e-business & web science research group
>> universitaet der bundeswehr muenchen
>> 
>> e-mail:  hepp@ebusiness-unibw.org
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>> 
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> 
> 
> ----
> Ivan Herman, W3C Semantic Web Activity Lead
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> 
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> 
> 
> 
Received on Monday, 31 October 2011 08:08:19 GMT

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