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Re: Announce: Linked Data Patterns book

From: Dan Brickley <danbri@danbri.org>
Date: Wed, 7 Apr 2010 09:48:12 +0200
Message-ID: <n2peb19f3361004070048v9419feb5r9e7d4515cfd6d98b@mail.gmail.com>
To: Ian Davis <lists@iandavis.com>
Cc: Peter Ansell <ansell.peter@gmail.com>, Leigh Dodds <leigh.dodds@talis.com>, Linking Open Data <public-lod@w3.org>
On Wed, Apr 7, 2010 at 1:31 AM, Ian Davis <lists@iandavis.com> wrote:
> On Wed, Apr 7, 2010 at 12:14 AM, Peter Ansell <ansell.peter@gmail.com> wrote:
>> In the Annotation publishing pattern section there is the following statement:
>>
>> "It is entirely consistent with the Linked Data principles to make
>> statements about third-party resources."
>>
>> I don't believe that to be true, simply because, unless users are
>> always using a quad model (RDF+NamedGraphs), they have no way of
>> retrieving that information just by resolving the foreign identifier
>> which is the subject of the RDF triple. They would have to stumble on
>> the information by knowing to retrieve the object URI, which isn't
>> clear from the pattern description so far. In a triples model it is
>> harmful to have this pattern as Linked Data, as the statements are not
>> discoverable just knowing the URI.
>>
>
> Can you elaborate more on the harm you suggest here?
>
> I don't think we need to limit the data published about a subject to
> that subset retrievable at its URI.  (I wrote a little about this last
> year at http://blog.iandavis.com/2009/10/more-than-the-minimum )
>
> I also don't believe this requires the use of quads. I think it can be
> interlinked using rdfs:seeAlso.

I've been plugging that idea for ages,
http://www.oreillynet.com/xml/blog/2003/12/dan_brickleys_rdfsseealso_rdf.html
Something like http://www.w3.org/2001/sw/Europe/talks/xml2003/slide9-3.html
<Person>
 <name>Dan Brickley</name>
 <rdfs:seeAlso>
   <x:Bibliography rdf:about="../stuffIwrote.rdf"/>
 </rdfs:seeAlso>
 <rdfs:seeAlso>
   <x:Resume rdf:about="../cv.rdf"/>
 </rdfs:seeAlso>
</Person>

LOD added to this a hearty enthusiasm for URIs everywhere, and a *lot*
of data; but I don't think we can avoid things having multiple
descriptions in different documents, whether exported from one
database or several. In fact the lovely thing about RDF is that you
can superimpose data graphs very easily. What we haven't really
explored properly yet is giving types to these RDF documents, although
there have been lots of experiments (schemarama etc).

Dan
Received on Wednesday, 7 April 2010 07:48:46 UTC

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