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Re: RDF 1.1 Lite Issue # 2: property vs rel

From: Martin Hepp <martin.hepp@ebusiness-unibw.org>
Date: Tue, 25 Oct 2011 11:37:47 +0200
Cc: Gregg Kellogg <gregg@kellogg-assoc.com>, Manu Sporny <msporny@digitalbazaar.com>, W3C Vocabularies <public-vocabs@w3.org>, HTML Data Task Force WG <public-html-data-tf@w3.org>
Message-Id: <10411494-6329-4E0B-8D8C-C0269B24DBAE@ebusiness-unibw.org>
To: Henri Sivonen <hsivonen@iki.fi>, Guha Guha <guha@google.com>

On Oct 25, 2011, at 10:00 AM, Henri Sivonen wrote:

> I think efforts to fix RDFa are doomed if they try to be backwards
> compatible with RDFa 1.0 in the sense that any RDFa 1.0 input you can
> construct produces the same triples in an RDFa_fixed processor as it
> would in an RDFa 1.0 processor. If you choose that route, you don't
> get to *remove* any of the badness of RDFa 1.0. And *removing* badness
> of RDFa is the kind of fixing RDFa needs. 

strong +1 !

I think the main problems of RDFa, caused by RDF heritage are to repeat aspects defined in the schema/vocabulary in the data markup, like

a) the datatype (if the schema defines the datatype, it is in 99% redundant to repeat it in the instance data)
b) the rel/property distinction (why do I have to look up whether the property is a datatype or object property at markup time if this is defined in the schema).

From the history of RDF being schema-less in the beginning, it is clear why you have datatype and rel/property in RDFa, but I am confident they are now major inhibitors to broad adoption of structured data in HTML markup.


martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

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Received on Tuesday, 25 October 2011 09:38:20 UTC

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