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Re: RDFa reliance on namespace declaration

From: Ben Adida <ben@mit.edu>
Date: Thu, 15 Jun 2006 09:30:19 -0400
Message-Id: <80D819EE-05AE-43AB-A21D-8530BE8CF52D@mit.edu>
Cc: Misha Wolf <Misha.Wolf@reuters.com>, public-rdf-in-xhtml task force <public-rdf-in-xhtml-tf@w3.org>, www-tag@w3.org, newsml-2@yahoogroups.com
To: Anne van Kesteren <annevk@opera.com>, Ian Davis <iand@internetalchemy.org>

My 2 cents while glancing at this.

Ian, thank you very much for pointing out a real technical issue that  
we should absolutely address. This is one of the first issues we'll  
take up in July (when I start leading the telecons again.)

Anne, your point is well taken: there might be a way here to hit two  
birds with one stone: moving away from xmlns declarations to address  
Ian's point, and towards something that is more text/html friendly at  
the same time (but still XHTML compatible, of course), which might  
make RDFa adoption workable for the HTML5 folks, if they so choose.

Ian, I see on your blog that you said that using '.' and '-' were  
arbitrary decisions. So, I'm wondering, since I now clearly  
understand how QNames are not supposed to apply to attribute  
*values*, why didn't you choose the ':' separator? There would be no  
overlap with QNames from a machine parser standpoint, since QNames  
don't apply to attribute values, but at least, from a "human parser"  
perspective, they would immediately ring a bell.

(I also see that you're trying to find a way to make copy&paste work  
with eRDF so that schema declarations aren't purely in the HEAD,  


On Jun 15, 2006, at 6:13 AM, Anne van Kesteren wrote:

> On Wed, 14 Jun 2006 20:38:23 +0200, Ian Davis  
> <iand@internetalchemy.org> wrote:
>>> Hi Ian,
>>>  Good point.  NewsML 2 has also taken your approach #2.  What  
>>> syntax is eRDF using for this?
>> eRDF uses a convention that I first saw described in a W3C  
>> workshop report from 1996 [1]. This was later adopted for the  
>> Dublin Core[2].
>> Basically a schema prefix is declared in the head of the document  
>> like this:
>> <link rel="schema.dc" href="http://purl.org/dc/elements/1.1/" />
> That's interesting. It also seems a better solution than RDFa as it  
> integrates with text/html documents rather nicely.
> -- 
> Anne van Kesteren
> <http://annevankesteren.nl/>
> <http://www.opera.com/>
Received on Thursday, 15 June 2006 13:30:30 UTC

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