Re: Property "geographic identifier" in LOCN (was: Re: ISA Core Location Vocabulary)

Hello Andrea, all,

I had been staring at this property a while too. I am afraid I still 
don't quite get why it exists. I think I understood it to mean: "Please 
use rdfs:also if you want to include a relationship to an externally 
defined geographical feature". But then I still do not understand why 
such advice is needed, or why one should not have the freedom to pick 
the most appropriate means of declaring relationships with geographical 
features.

Could it be that there are historical reasons for the existence of 
"geographic identifier"? In the domains of INSPIRE and OGC/ISO191xx it 
makes sense to talk about geographic identifiers, and including the 
concept of an identifier in a data model. But in the domain of Linked 
Data, everything, including geographical features, automatically has 
global identifier: a URI.

Is it possible to give an RDF example of meaningful usage of "geographic 
identifier"? I think that could help  in understanding the issue.

Regards,
Frans

On 2013-12-30 1:29, Andrea Perego wrote:
> (Original message: 
> http://lists.w3.org/Archives/Public/public-locadd/2013Dec/0031.html)
>
>
> Thanks for raising this issue, Oscar.
>
> "Geographic identifier" is actually one of the terms in the LOCN voc 
> with some open issues - the other two being locn:Geometry and 
> locn:addressId. And this is why they have been marked as unstable.
>
> As explained in the corresponding usage note [1], the purpose of this 
> term, and of giving to it a specific label, was to explicitly denote a 
> specific type of (possibly HTTP) URI reference, i.e., the one denoting 
> a location. This of course can be expressed by using @rdf:about and/or 
> rdfs:seeAlso (which can also be used to specify additional location 
> URIs). Using "see also" as a label might then be equally misleading.
>
> Any suggestion on how to address this issue? Should this term be 
> modelled differently?
>
> Cheers,
>
> Andrea
>
> ----
> [1]http://www.w3.org/ns/locn#rdfs:seeAlso
>
> On Sat, Dec 28, 2013 at 11:54 AM, Oscar Corcho <ocorcho@fi.upm.es 
> <mailto:ocorcho@fi.upm.es>> wrote:
>
>     Hi Andrea,
>
>
> [snip]
>
>     Finally, although a minor comment, I think that the property
>     geographic identifier that then converts into rdfs:seeAlso is a
>     bit misleading. Why don't you use directly rdfs:seeAlso and
>     explain that it can be used for that?
>
>     Oscar
>
>     -- 
>
>     Oscar Corcho
>
>     Ontology Engineering Group (OEG)
>
>     Departamento de Inteligencia Artificial
>
>     Facultad de Informática
>
>     Campus de Montegancedo s/n
>
>     Boadilla del Monte-28660 Madrid, España
>
>     Tel. (+34) 91 336 66 05 <tel:%28%2B34%29%2091%20336%2066%2005>
>
>     Fax (+34) 91 352 48 19 <tel:%28%2B34%29%2091%20352%2048%2019>
>
>
>     De: Andrea Perego <andrea.perego@jrc.ec.europa.eu
>     <mailto:andrea.perego@jrc.ec.europa.eu>>
>     Fecha: jueves, 19 de diciembre de 2013 10:11
>     Para: LocAdd W3C CG Public Mailing list <public-locadd@w3.org
>     <mailto:public-locadd@w3.org>>
>     CC: Michael Lutz <michael.lutz@jrc.ec.europa.eu
>     <mailto:michael.lutz@jrc.ec.europa.eu>>
>     Asunto: ISA Core Location Vocabulary
>     Nuevo envío de: <public-locadd@w3.org <mailto:public-locadd@w3.org>>
>     Fecha de nuevo envío: Thu, 19 Dec 2013 09:12:41 +0000
>
>     Dear colleagues,
>
>     You may be aware that, yesterday, the ISA Core Location Vocabulary
>     has been published in W3C space:
>
>     http://www.w3.org/ns/locn#
>
>     This vocabulary has been developed in the framework of Action 1.1
>     of the EU ISA Programme [1] and contributed to W3C in May 2012,
>     along with other two ISA core vocabularies, namely, the Registered
>     Organization and the ISA Core Person vocabularies [2,3].
>
>     The ISA Core Location (LOCN) vocabulary is now, quoting the
>     namespace doc, "under the control" of the LOCADD CG. Further
>     developments of this work are then based on possible interest of
>     CG members.
>
>     We would like to ask your feedback on this, in order to evaluate
>     the possibility of considering the LOCN vocabulary as a possible
>     work item for our CG.
>
>     Best,
>
>     Michael and Andrea
>
>     ----
>     [1]https://joinup.ec.europa.eu/community/core_vocabularies
>     [2]http://www.w3.org/TR/vocab-regorg/
>     [3]http://www.w3.org/ns/person#
>
>     -- 
>     Andrea Perego, Ph.D.
>     European Commission DG JRC
>     Institute for Environment & Sustainability
>     Unit H06 - Digital Earth & Reference Data
>     Via E. Fermi, 2749 - TP 262
>     21027 Ispra VA, Italy
>
>     DE+RD Unit: http://ies.jrc.ec.europa.eu/DE
>
>     ----
>     The views expressed are purely those of the writer and may
>     not in any circumstances be regarded as stating an official
>     position of the European Commission.
>
>
>
>
> -- 
> Andrea Perego, Ph.D.
> European Commission DG JRC
> Institute for Environment & Sustainability
> Unit H06 - Digital Earth & Reference Data
> Via E. Fermi, 2749 - TP 262
> 21027 Ispra VA, Italy
>
> DE+RD Unit: http://ies.jrc.ec.europa.eu/DE
>
> ----
> The views expressed are purely those of the writer and may
> not in any circumstances be regarded as stating an official
> position of the European Commission.