suppose the geoname resource is:
<gn:Feature rdf:about="http://sws.geonames.org/2378080/";>
<rdfs:isDefinedBy rdf:resource="http://sws.geonames.org/2378080/about.rdf"/>
<gn:name>Mauritania</gn:name>
</gn:Featue>
I want to get name of country_geo
select ?o ?cname
where {?s SIO:SIO_000664 ?o;
?s a foaf:Person.
?o gn:name ?cname }
limit 10
how I can traverse to geonames ontology to get a name property ???
On Tue, Dec 29, 2015 at 6:36 PM, Kingsley Idehen <kide...@openlinksw.com>
wrote:
> On 12/29/15 8:31 AM, Eng.Bassam wrote:
>
> Hello
> I have a person pesron table with columns (id, name , country_geo), person
> table type in R2RML is foaf:person, I have also loaded geonames onology in
> my virtuoso server at link http://localhost:8890/ontologies/geonames
>
> now for the country_geo column the r2rml is :
> rr:predicateObjectMap [ rr:predicateMap [ rr:constant SIO:SIO_000664 ] ;
> rr:objectMap [ rr:column "Country_geo" ]; ] ;
>
> the value of country_geo is IRI e.g " <http://sws.geonames.org/2378080/>
> http://sws.geonames.org/2378080/"; described in my loaded ontology
> geonames.
> now how can I make the generated country_geo property in person refer to
> my loaded ontology geonames, what should I write in r2rml ???
> my objective is making sparql queries on the generated views (persons) and
> traverse to geonames for more info about countries.
>
> wish it's clear question :)
> thanks
>
> --
> -----------------------------------
> > Eng.Bassam Najeeb.
> >Software Engineer.
>
>
> Okay, so have you generated you views and hit a problem? You are already
> mapping Geoname IRIs to country_geo, so your end product would be instances
> of a class that have IRI property values from the geonames ontology. Net
> effect, from your SPARQL DESCRIBE, SELECT, or CONSTRUCTs on the foaf:Person
> instances you will be able to follow-your-nose through SIO:SIO_000664
> property values.
>
> select ?o
> where {?s SIO:SIO_000664 ?o;
> ?s a foaf:Person. }
> limit 10
>
>
> Kingsley
>
>
>
>
> ------------------------------------------------------------------------------
>
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>
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>
> --
> Regards,
>
> Kingsley Idehen
> Founder & CEO
> OpenLink Software
> Company Web: http://www.openlinksw.com
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--
-----------------------------------
> Eng.Bassam Najeeb.
>Software Engineer.
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