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Re: context of dc:identifier

From: Hammond, Tony <t.hammond@nature.com>
Date: Mon, 03 Sep 2007 16:09:46 +0100
To: Reto Bachmann-Gmür <rbg@talis.com>, <semantic-web@w3.org>
Message-ID: <C301E24A.8BCF%t.hammond@nature.com>

Ah, very interesting.

Note that Adobe's XMP spec (which profiles RDF/XML) deprecates use of
dc:identifier precisely because of lack of context. Instead it is
recommended to use xmp:Identifier (a Bag) and to qualify with xmpidq:Scheme.
Here though I've found no examples of usage and would be very (well)
interested to learn of any. So, the XMP way of declaring an identifier is
something like this:

<rdf:Description rdf:about="" xmlns:xmp="http://ns.adobe.com/xap/1.0/"
xmlns:xmpidq="http://ns.adobe.com/xmp/Identifier/qual/1.0/">
   <xmp:Identifier>
      <rdf:Bag>
        <rdf:li xmpidq:Scheme="URI">info:doi/10.1038/nature06065.f1</rdf:li>
      </rdf:Bag>
   </xmp:Identifier>
 </rdf:Description>

I don't know what values are appropriate for xmpidq:Scheme (since there are
no examples and no closed set definitions) but expect that "URI" might be a
contender. Any ideas? Or pointers?

(Apologize for the use of a non-HTTP example, but couldn't be bothered to
fake it. ;)

Cheers,

Tony



On 3/9/07 15:29, "Reto Bachmann-Gmür" <rbg@talis.com> wrote:

> 
> I was wondering about the scope of identifier when using dc:identifier.
> The definition quoted on http://www.w3.org/TR/rdf-primer/ is
> 
>     * *Identifier*: An unambiguous reference to the resource within a
>       given context.
> 
> I was wondering what the "given context" might be when using
> dc:identifier in an rdf-graph. Any suggestion on how to express or on
> how to guess this context?
> 
> cheers,
> reto

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Received on Monday, 3 September 2007 15:10:27 UTC

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