Hey everyone,
Wikidata’s birthday is still a few days away but since there are no deployments on Sundays here is early birthday present number 2 ;-)
One of Wikidata’s most important but often under-appreciated areas is the external identifiers. They link Wikidata with by now more than 2000 databases, knowledge bases, catalogs and more. External identifiers allow people and machines access to more information about a given topic and help identify the same concept in other databases.
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent
external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921). I’m looking forward to seeing what new things are going to be built with this and how we will show up on http://lod-cloud.net.
Cheers Lydia
PS: It will take a reload of the query service to also have the full URIs included there for all items. This should happen in the first two weeks of November. (Tracking is in https://phabricator.wikimedia.org/T176593) Until then only newly added or edited items will have the full URIs added to the query service.
Lydia Pintscher, 26/10/2017 20:21:
I’m looking forward to seeing what new things are going to be built with this and how we will show up on http://lod-cloud.net.
Me too! Things seem to be changing rapidly over there, unless it's just an optical effect. For instance my main take-away used to be that GeoNames is very central (see e.g. http://lod-cloud.net/versions/2017-01-26/cloudImage2017.svg) but in the latest versions I can't even locate it.
Federico
Congrats! That's great!
But I am afraid that we need to do some cleanup of the already existing values. For example the “URI used in RDF” for GND identifiers was "http://d-nb.info/gnd/$1/about/rdf" that is the URI of the file describing the entity in RDF and not "http://d-nb.info/gnd/$1". I believe it's a good use case for a feature that would allow to protect statements from good faith mistakes that could completely beak a mapping and all tools that use it. The query with all the values for this property is: http://tinyurl.com/ydxeurn4
Cheers,
Thomas
Le 26 oct. 2017 à 19:21, Lydia Pintscher lydia.pintscher@wikimedia.de a écrit :
Hey everyone,
Wikidata’s birthday is still a few days away but since there are no deployments on Sundays here is early birthday present number 2 ;-)
One of Wikidata’s most important but often under-appreciated areas is the external identifiers. They link Wikidata with by now more than 2000 databases, knowledge bases, catalogs and more. External identifiers allow people and machines access to more information about a given topic and help identify the same concept in other databases.
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921). I’m looking forward to seeing what new things are going to be built with this and how we will show up on http://lod-cloud.net.
Cheers Lydia
PS: It will take a reload of the query service to also have the full URIs included there for all items. This should happen in the first two weeks of November. (Tracking is in https://phabricator.wikimedia.org/T176593) Until then only newly added or edited items will have the full URIs added to the query service.
-- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata
Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Woot! Woot! The lod-cloud.net visualization will be super useful for outreach and communications about our work! Thank you for updating, and looking forward to an update when the visualization is live.
Cheers,
Alex
On Thu, Oct 26, 2017 at 3:27 PM, Thomas Pellissier Tanon < thomas@pellissier-tanon.fr> wrote:
Congrats! That's great!
But I am afraid that we need to do some cleanup of the already existing values. For example the “URI used in RDF” for GND identifiers was " http://d-nb.info/gnd/$1/about/rdf" that is the URI of the file describing the entity in RDF and not "http://d-nb.info/gnd/$1". I believe it's a good use case for a feature that would allow to protect statements from good faith mistakes that could completely beak a mapping and all tools that use it. The query with all the values for this property is: http://tinyurl.com/ydxeurn4
Cheers,
Thomas
Le 26 oct. 2017 à 19:21, Lydia Pintscher lydia.pintscher@wikimedia.de
a écrit :
Hey everyone,
Wikidata’s birthday is still a few days away but since there are no deployments on Sundays here is early birthday present number 2 ;-)
One of Wikidata’s most important but often under-appreciated areas is the external identifiers. They link Wikidata with by now more than 2000 databases, knowledge bases, catalogs and more. External identifiers allow people and machines access to more information about a given topic and help identify the same concept in other databases.
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921). I’m looking forward to seeing what new things are going to be built with this and how we will show up on http://lod-cloud.net.
Cheers Lydia
PS: It will take a reload of the query service to also have the full URIs included there for all items. This should happen in the first two weeks of November. (Tracking is in https://phabricator.wikimedia.org/T176593) Until then only newly added or edited items will have the full URIs added to the query service.
-- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata
Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Yes, another great birthday gift! Thank you all! :)))
L.
2017-10-26 19:21 GMT+02:00 Lydia Pintscher lydia.pintscher@wikimedia.de:
Hey everyone,
Wikidata’s birthday is still a few days away but since there are no deployments on Sundays here is early birthday present number 2 ;-)
One of Wikidata’s most important but often under-appreciated areas is the external identifiers. They link Wikidata with by now more than 2000 databases, knowledge bases, catalogs and more. External identifiers allow people and machines access to more information about a given topic and help identify the same concept in other databases.
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921). I’m looking forward to seeing what new things are going to be built with this and how we will show up on http://lod-cloud.net.
Cheers Lydia
PS: It will take a reload of the query service to also have the full URIs included there for all items. This should happen in the first two weeks of November. (Tracking is in https://phabricator.wikimedia.org/T176593) Until then only newly added or edited items will have the full URIs added to the query service.
-- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata
Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Hi Lydia an all of you,
Lydia wrote:
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921).
Could you give an example? The RDF of item Q43027 with LoC ID n81114174 does not include the URI http://id.loc.gov/authorities/names/n81114174 if exported with http://www.wikidata.org/wiki/Special:EntityData/Q43027
I also tried with a statement just added to make sure it's not some caching issue. Is the feature not enabled yet?
In particular I'm interested how the external URI and Wikidata URI are connected.
subject: http://www.wikidata.org/entity/Q43027 property: ??? object: http://id.loc.gov/authorities/names/n81114174
I'm sure the RDF-property also depends on the Wikidata-property so this feature requires some additional tweaking. At least the property is not always owl:sameAs because we have at least 1-to-n relationships between Wikidata items and external ids.
Cheers, Jakob
P.S: Won't have time to cover all these aspects in my WikidataCon Lightening talk about https://www.wikidata.org/wiki/Wikidata:Identifiers
Due to massive performance problems, Wikibase was roleld back to the previous version last night. So the new features currently do not work. We are working hard to find the cause of the problem (which may or may not be related to Wikidata), so we can deploy the latest version again.
Sorry for the confusion!
Am 27.10.2017 um 11:06 schrieb Jakob Voß:
Hi Lydia an all of you,
Lydia wrote:
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921).
Could you give an example? The RDF of item Q43027 with LoC ID n81114174 does not include the URI http://id.loc.gov/authorities/names/n81114174 if exported with http://www.wikidata.org/wiki/Special:EntityData/Q43027
I also tried with a statement just added to make sure it's not some caching issue. Is the feature not enabled yet?
In particular I'm interested how the external URI and Wikidata URI are connected.
subject: http://www.wikidata.org/entity/Q43027 property: ??? object: http://id.loc.gov/authorities/names/n81114174
I'm sure the RDF-property also depends on the Wikidata-property so this feature requires some additional tweaking. At least the property is not always owl:sameAs because we have at least 1-to-n relationships between Wikidata items and external ids.
Cheers, Jakob
P.S: Won't have time to cover all these aspects in my WikidataCon Lightening talk about https://www.wikidata.org/wiki/Wikidata:Identifiers
On Fri, Oct 27, 2017 at 11:06 AM, Jakob Voß Jakob.Voss@gbv.de wrote:
Hi Lydia an all of you,
Lydia wrote:
The identifier can often be expanded to a full URI. (For example, LoC ID n81114174 becomes http://id.loc.gov/authorities/names/n81114174.) This full URI can then be used in the linked open data web to match our data with other datasets and use both of them together easily.
From today on, Wikidata has full URIs for statements that represent external identifiers in its RDF exports, and thereby becomes a proper citizen of the linked open data web. To make this work the property for the external ID needs to have a statement with property “URI used in RDF” (https://www.wikidata.org/wiki/Property:P1921).
Could you give an example? The RDF of item Q43027 with LoC ID n81114174 does not include the URI http://id.loc.gov/authorities/names/n81114174 if exported with http://www.wikidata.org/wiki/Special:EntityData/Q43027
I also tried with a statement just added to make sure it's not some caching issue. Is the feature not enabled yet?
In particular I'm interested how the external URI and Wikidata URI are connected.
subject: http://www.wikidata.org/entity/Q43027 property: ??? object: http://id.loc.gov/authorities/names/n81114174
I'm sure the RDF-property also depends on the Wikidata-property so this feature requires some additional tweaking. At least the property is not always owl:sameAs because we have at least 1-to-n relationships between Wikidata items and external ids.
Hey :)
It is back and your example works now for me.
Cheers Lydia