Re: RDF WG Resolution Regarding Various Forms of String Literals

Ah, indeed, I thought that we have made the bridge...

So, there is an issue at the RDF WG:

http://www.w3.org/2011/rdf-wg/track/issues/40

which was resolved:

http://www.w3.org/2011/rdf-wg/meeting/2011-05-18#resolution_2

And the essential of the proposed edits for the new version of the RDF documents is at

http://lists.w3.org/Archives/Public/public-rdf-wg/2011May/0238.html

with a missing piece in 

http://www.w3.org/2011/rdf-wg/meeting/2011-05-25#resolution_2

If you do not want to read through all these, the essence is that there is preferred skolemization mechanism proposed by the RDF WG, namely to use

http://{YOUR DOMAIN}/.well-known/genid/{SOMETHING UNIQUE}

and W3C will register the 'genid' well known URI portion (I am not sure what the official term is).

We had a discussion in this group (though I cannot point to one ISSUE on tracker, we may want to add an explicit ISSUE) whether DM and/or R2RML would avoid generating blank nodes but would generate IRI-s instead, and what would be the preferred approach. I would propose to follow the approach described by the RDF WG if we go that way.

Ivan



On Jun 16, 2011, at 09:58 , Michael Hausenblas wrote:

> 
>> I am not sure this has an effect on R2RML or DM; possibly not. But you may want to know about that anyway!
> 
> Thanks.
> 
> Scanned our issues and didn't find anything matching - maybe someone else has an idea?
> 
> However, we have a 'pending review' issue (ISSUE-29) which, I *think* can be re-opened now based on [1].
> 
> Ivan/Richard/Souri - whoever is also in the RDF WG, can you confirm this please?
> 
> Cheers,
> 	Michael
> 
> [1] http://www.w3.org/2011/rdf-wg/wiki/Skolemisation
> --
> Dr. Michael Hausenblas, Research Fellow
> 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
> 
> On 16 Jun 2011, at 08:36, Ivan Herman wrote:
> 
>> I am not sure this has an effect on R2RML or DM; possibly not. But you may want to know about that anyway!
>> 
>> Ivan
>> 
>> Begin forwarded message:
>> 
>>> Resent-From: public-rdf-wg@w3.org
>>> From: David Wood <david@3roundstones.com>
>>> Date: June 15, 2011 18:39:19 GMT+02:00
>>> To: Manu Sporny <msporny@digitalbazaar.com>, Ian Horrocks <ian.horrocks@comlab.ox.ac.uk>, Lee Feigenbaum <lee@thefigtrees.net>
>>> Cc: RDF Working Group WG <public-rdf-wg@w3.org>, W3C SW CG Group <w3c-semweb-cg@w3.org>, public-rdf-dawg@w3.org
>>> Subject: RDF WG Resolution Regarding Various Forms of String Literals
>>> message-id: <5F656216-FE45-426E-A93E-4E90DDC3BE3D@3roundstones.com>
>>> 
>>> Hi all,
>>> 
>>> The RDF working group resolved our ISSUE-12 [1] today, which is intended to "reconcile various forms of string literals".
>>> 
>>> We resolved to accept the proposal at:
>>> http://www.w3.org/2011/rdf-wg/wiki/StringLiterals/AbolishUntaggedPlain
>>> with the modification that preferred output form (SHOULD) is "foo" not "foo"^^xsd:string in RDF; and we recommend that SPARQL and other WGs do the same.
>>> 
>>> Discussion highlighted several possible areas of concern, which we believe the current proposal addresses.  Specifically, it was noted that:
>>> 
>>> - The forms "foo" and "foo"^^xsd:string are equivalent input syntaxes.
>>> - The form "foo" is the preferred output syntax.
>>> - The WG suggests retaining the term "plain literal" in documents to avoid unnecessary rework.  Such plain literals would be considered semantically equivalent to xsd:strings.
>>> 
>>> NB: This resolution makes *no statement* about language-tagged literals (e.g. "foo"@en).
>>> 
>>> We invite discussion regarding the ramifications of this resolution to other working groups and implementors.
>>> 
>>> Regards,
>>> Dave
>>> 
>>> [1] http://www.w3.org/2011/rdf-wg/track/issues/12
>>> 
>>> 
>>> 
>> 
>> 
>> ----
>> Ivan Herman, W3C Semantic Web Activity Lead
>> Home: http://www.w3.org/People/Ivan/
>> mobile: +31-641044153
>> PGP Key: http://www.ivan-herman.net/pgpkey.html
>> FOAF: http://www.ivan-herman.net/foaf.rdf
>> 
>> 
>> 
>> 
>> 
>> 
> 


----
Ivan Herman, W3C Semantic Web Activity Lead
Home: http://www.w3.org/People/Ivan/
mobile: +31-641044153
PGP Key: http://www.ivan-herman.net/pgpkey.html
FOAF: http://www.ivan-herman.net/foaf.rdf

Received on Thursday, 16 June 2011 09:13:41 UTC