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Re: an alternative for microformat-like simplicity

From: Michael Hausenblas <michael.hausenblas@deri.org>
Date: Thu, 16 Jul 2009 18:20:00 +0100
To: Ben Adida <ben@adida.net>
CC: RDFa TF list <public-rdf-in-xhtml-tf@w3.org>
Message-ID: <C6851FD0.67C8%michael.hausenblas@deri.org>
Ben,

Sorry, I missed the today's telecon. Shame on me.

> Here's my proposed alternative: use RDF/OWL for vocabulary mappings, and
> add to RDFa only the ability to declare a default prefix.

My 2c: though I like the general idea, I have my issues with this proposal.
It looks a bit complex to me and might hence hinder adoption due to its
complexity.

For a better understanding, I have a question - you say:

> <div about="#me" prefix="http://myvocab.org/#">

And then 

> Vocabulary Definition at http://ben.adida.net/vocab, using RDFa:

Did I miss anything or how is the 'resolution protocol' thought to work?

Cheers,
      Michael

-- 
Dr. Michael Hausenblas
LiDRC - Linked Data Research Centre
DERI - Digital Enterprise Research Institute
NUIG - National University of Ireland, Galway
Ireland, Europe
Tel. +353 91 495730
http://linkeddata.deri.ie/
http://sw-app.org/about.html



> From: Ben Adida <ben@adida.net>
> Date: Thu, 16 Jul 2009 10:03:57 -0700
> To: RDFa TF list <public-rdf-in-xhtml-tf@w3.org>
> Subject: an alternative for microformat-like simplicity
> Resent-From: RDFa TF list <public-rdf-in-xhtml-tf@w3.org>
> Resent-Date: Thu, 16 Jul 2009 17:04:35 +0000
> 
> 
> Hi folks,
> 
> On the call today, we continued discussion of Mark's @token and @profile
> proposals:
> 
> http://webbackplane.com/mark-birbeck/blog/2009/04/30/tokenising-the-semantic-w
> eb
> 
> I brought up some concerns about the @profile portion of the proposal,
> specifically that:
> 
> - this is a vocabulary bundling issue that's being handled at the
> parsing level
> 
> - we already have vocabulary mapping features in the RDF/OWL processing
> layer.
> 
> 
> Here's my proposed alternative: use RDF/OWL for vocabulary mappings, and
> add to RDFa only the ability to declare a default prefix.
> 
> Markup in the page:
> 
> <div about="#me" prefix="http://myvocab.org/#">
>   My name is <span property="name">Ben Adida</span>
> 
>   and my email is
> 
>   <a rel="email" href="mailto:ben@adida.net">
>     ben@adida.net
>   </a>
> </div>
> 
> 
> Vocabulary Definition at http://ben.adida.net/vocab, using RDFa:
> 
> <div about="#name" typeof="rdf:Property">
>     <h4 property="rdfs:label">name</h4>,
>     which corresponds to
>     <a rel="owl:sameAs"
>        href="http://xmlns.com/foaf/0.1/name">
>          foaf:name
>     </a>.
> </div>
> 
> <div about="#email" typeof="rdf:Property">
>     <h4 property="rdfs:label">email</h4>,
>     which corresponds to
>     <a rel="owl:sameAs"
>        href="http://rdfs.org/sioc/ns#email">
>          sioc:email
>     </a>.
> </div>
> 
> 
> Thus, an RDFa parser would, without dereferencing anything, be able to
> generate the following triples:
> 
> <#me> <http://myvocab.org/#name> "Ben Adida" .
> <#me> <http://myvocab.org/#email> <mailto:ben@adida.net> .
> 
> which, through RDF/OWL sameAs inference (only sameAs is needed, nothing
> more), would be equivalent to the foaf:name and sioc:email properties.
> 
> The core idea here is that, since this is all about vocabulary mapping
> independent of the syntax (RDFa, RDF/XML, etc...), then let's use
> existing RDF mechanisms.
> 
> There are some edge cases to consider:
> 
> - what does rel="license" resolve to when @prefix is set? I think the
> reserved keywords should trump all, but it's worth a debate.
> 
> - what does rel="foobar" resolve to? I think if you've declared @prefix,
> then it is no longer ignored and there should be a foobar property
> within that vocabulary, but if there isn't then it's just a dead triple,
> very little harm in that.
> 
> -Ben
> 
Received on Thursday, 16 July 2009 17:20:42 GMT

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