W3C home > Mailing lists > Public > public-rdf-wg@w3.org > December 2011

Re: [GRAPH] graph deadlock?

From: Charles Greer <cgreer@marklogic.com>
Date: Mon, 19 Dec 2011 09:18:40 -0800
Message-ID: <4EEF71F0.4050703@marklogic.com>
To: Ivan Herman <ivan@w3.org>
CC: Pat Hayes <phayes@ihmc.us>, W3C RDF WG <public-rdf-wg@w3.org>

> I am not sure I understand. An application may declare whether it uses Datasets or RDF Graphs. If Datasets, then only labels are used for URI-s, which I believe is the way quadstores, for examples, are used already, as well as SPARQL datasets. For Named Graphs that may be used, for example, in the case provenance, applications know about the extra behaviour of the label (if GET-t, then bla bla bla...) which is then required by the standard.
>
> Ivan
+1
What I'm reading here is that named graphs are a special kind of label 
that explicitly provides for provenance and resolution.

I think that's a data-publishing requirement, and while it could find a 
place in the standard, it's a refinement of the broader Dataset notion.

The broader notion of quads for RDF-Datasets is necessary for practical 
applications.  Implementers need some way to uniquely identify sets of 
triples, and in the absence of need for provenance or resolution (which 
are provided by the database container/sparql endpoint) the use of the 
quad should be left alone.  Even in web-space, data publishers need some 
flexibility in that 4th position, in order to stage and prepare data 
before releasing it to the web.

Charles


>
>
>
>
>> Pat
>>
>>> I am not sure how this affects serialization.
>>>
>>> Cheers
>>>
>>> Ivan
>>>
>>>
>>> ----
>>> Ivan Herman, W3C Semantic Web Activity Lead
>>> Home: http://www.w3.org/People/Ivan/
>>> mobile: +31-641044153
>>> FOAF: http://www.ivan-herman.net/foaf.rdf
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>> ------------------------------------------------------------
>> IHMC                                     (850)434 8903 or (650)494 3973
>> 40 South Alcaniz St.           (850)202 4416   office
>> Pensacola                            (850)202 4440   fax
>> FL 32502                              (850)291 0667   mobile
>> phayesAT-SIGNihmc.us       http://www.ihmc.us/users/phayes
>>
>>
>>
>>
>>
>>
>
> ----
> Ivan Herman, W3C Semantic Web Activity Lead
> Home: http://www.w3.org/People/Ivan/
> mobile: +31-641044153
> FOAF: http://www.ivan-herman.net/foaf.rdf
>
>
>
>
>
>


-- 
Charles Greer
Senior Engineer
MarkLogic Corporation
charles.greer@marklogic.com
Phone: +1 707 408 3277
www.marklogic.com

This e-mail and any accompanying attachments are confidential. The information is intended solely for the use of the individual to whom it is addressed. Any review, disclosure, copying, distribution, or use of this e-mail communication by others is strictly prohibited. If you are not the intended recipient, please notify us immediately by returning this message to the sender and delete all copies. Thank you for your cooperation.
Received on Monday, 19 December 2011 17:21:36 GMT

This archive was generated by hypermail 2.3.1 : Tuesday, 26 March 2013 16:25:46 GMT