Markus,
Thank you very much for this. Translating Wikidata into the language of
the Semantic Web is important. Being able to explore the Wikidata taxonomy
[1] by doing SPARQL queries in Protege [2] (even primitive queries) is
really neat, e.g.
SELECT ?subject
WHERE
{
?subject rdfs:subClassOf <http://www.wikidata.org/entity/Q82586> .
}
This is more of an issue of my ignorance of Protege, but I notice that the
above query returns only the direct subclasses of Q82586. The full set of
subclasses for Q82586 ("lepton") is visible at
http://tools.wmflabs.org/wikidata-todo/tree.html?q=Q82586&rp=279&lang=en --
a few of the 2nd-level subclasses (muon neutrino, tau neutrino, electron
neutrino) are shown there but not returned by that SPARQL query. It seems
rdfs:subClassOf isn't being treated as a transitive property in Protege.
Any ideas?
Do you know when the taxonomy data in OWL will have labels available?
Also, regarding the complete dumps, would it be possible to export a
smaller subset of the faithful data? The files under "Complete Data Dumps"
in http://tools.wmflabs.org/wikidata-exports/rdf/exports/20140526/ look too
big to load into Protege on most personal computers, and would likely
require adjusting JVM settings on higher-end computers to load. If it's
feasible to somehow prune those files -- and maybe even combine them into
one file that could be easily loaded into Protege -- that would be
especially nice.
Thanks,
Eric
https://www.wikidata.org/wiki/User:Emw
1.
http://tools.wmflabs.org/wikidata-exports/rdf/exports/20140526/wikidata-taxonomy.nt.gz
2. http://protege.stanford.edu/
On Tue, Jun 10, 2014 at 4:43 AM, Markus Kroetzsch <
markus.kroetz...@tu-dresden.de> wrote:
> Hi all,
>
> We are now offering regular RDF dumps for the content of Wikidata:
>
> http://tools.wmflabs.org/wikidata-exports/rdf/
>
> RDF is the Resource Description Framework of the W3C that can be used to
> exchange data on the Web. The Wikidata RDF exports consist of several files
> that contain different parts and views of the data, and which can be used
> independently. Details on the available exports and the RDF encoding used
> in each can be found in the paper "Introducing Wikidata to the Linked Data
> Web" [1].
>
> The available RDF exports can be found in the directory
> http://tools.wmflabs.org/wikidata-exports/rdf/exports/. New exports are
> generated regularly from current data dumps of Wikidata and will appear in
> this directory shortly afterwards.
>
> All dump files have been generated using Wikidata Toolkit [2]. There are
> some important differences in comparison to earlier dumps:
>
> * Data is split into several dump files for convenience. Pick whatever you
> are most interested in.
> * All dumps are generated using the OpenRDF library for Java (better
> quality than ad hoc serialization; much slower too ;-)
> * All dumps are in N3 format, the simplest RDF serialization format that
> there is
> * In addition to the faithful dumps, some simplified dumps are also
> available (one statement = one triple; no qualifiers and references).
> * Links to external data sets are added to the data for Wikidata
> properties that point to datasets with RDF exports. That's the "Linked" in
> "Linked Open Data".
>
> Suggestions for improvements and contributions on github are welcome.
>
> Cheers,
>
> Markus
>
> [1] http://korrekt.org/page/Introducing_Wikidata_to_the_Linked_Data_Web
> [2] https://www.mediawiki.org/wiki/Wikidata_Toolkit
>
> --
> Markus Kroetzsch
> Faculty of Computer Science
> Technische Universität Dresden
> +49 351 463 38486
> http://korrekt.org/
>
> _______________________________________________
> Wikidata-l mailing list
> Wikidata-l@lists.wikimedia.org
> https://lists.wikimedia.org/mailman/listinfo/wikidata-l
>
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