Hi Marco,
I'm also following this project.
DBpedia already has an extractor that uses the wikidata dumps directly in
order to produce dbpedia sameas wikidata links. However it might be
interesting to compare the two just for fun and other purposes.
Here is a very simple shell script I was playing around with [1]. It
outputs DBpedia sameAs Wikidata triples based on the dbpedia2freebase
alignment and freebase2wikidata. The script can be modified for other
purposes, one could generate dbpedia sameas freebase links out of it
without downloading the freebase dump (if one wants to rely on the samsung
sameas files).
I found the schema matching part more interesting, however those files seem
to be DRM encrypted and I can't open them. Do you have the same problem
[2][3] ?
[1] https://gist.github.com/alexandrutodor/19efe53c06faed630562
[2]
https://github.com/Samsung/KnowledgeSharingPlatform/tree/master/schema-matching
[3] https://github.com/Samsung/KnowledgeSharingPlatform/tree/master/ontology
Cheers,
Alexandru
On Thu, Apr 9, 2015 at 3:12 PM, Marco Fossati <hell.j....@gmail.com> wrote:
> May be of interest for the next DBpedia release.
> Cheers!
>
> On 4/9/15 2:00 PM, wikidata-l-requ...@lists.wikimedia.org wrote:
> > Message: 4
> > Date: Wed, 8 Apr 2015 22:03:29 +0900
> > From: Kim Haklae<haklae...@gmail.com>
> > To: "Discussion list for the Wikidata project."
> > <wikidat...@lists.wikimedia.org>
> > Subject: [Wikidata-l] Wikidata-Freebase mappings
> > Message-ID:
> > <CABiLeYaSidbYJwrOQVhtdrgjVEQbgTWCn3B-=
> ecp_vuutdk...@mail.gmail.com>
> > Content-Type: text/plain; charset="utf-8"
> >
> > Hi all,
> >
> > I am pleased to announce that the Freebase-Wikidata mappings are shared
> in
> > public.
> >
> >
> >
> > http://github.com/Samsung/KnowledgeSharingPlatform
> >
> >
> >
> > Google is already providing the mapping relation between Freebase and
> > Wikidata (https://developers.google.com/freebase/data), however, they
> might
> > not offer a updated version. We extract a set of identical relations from
> > both Freebase and Wikidata datasets using Wikipedia links; several
> > algorithms are also tested to find out same entity pairs. Although this
> > approach is limited to identifying all same entities of both datasets, it
> > would be a useful source to understand instances of both data sources.
> The
> > source code for extracting this data will also be shared soon.
> >
> > The data is serialised using the N-Triples format, and the following is
> the
> > details of this data:
> >
> > - Total 4,395,258 triples (same entity pairs)
> >
> > - Updated: February 13, 2015
> >
> > - Data Format: N-Triples RDF
> >
> > - License: CC0
> >
> > - File size: 236 MB zip
> >
> > - File size: 2.5 GB (uncompressed)
> >
> >
> >
> > Feel free to ask me if you have any questions.
> >
> >
> > Cheers,
> >
> > Haklae Kim
> >
> > Senior Engineer
> >
> > Samsung Electronics Co., Ltd.
> > scot....@samsung.com /haklae...@gmail.com
> >
>
> --
> Marco Fossati
> http://about.me/marco.fossati
> Twitter: @hjfocs
> Skype: hell_j
>
>
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