Hi Max,
indeed, I am not suggesting creating a new property. The data release
that was made today basically provides data for P646.
Cheers,
Denny
Regarding the off-topic part of your mail, I want to point out to my
personal opinion with regards to data licensing, which was formulated
before I started my current job: <http://simia.net/wiki/Free_data> .
This is solely my opinion though, but it did influence my voice in the
decision-making process around the license for Wikidata in my previous job.
On Mon, Nov 11, 2013 at 12:22 PM, Klein,Max <kleinm(a)oclc.org> wrote:
Hello All,
We already do have a freebase ID, similar to the VIAF one- it's
P646<http://www.wikidata.org/wiki/Property:P646>
.
I just went back into the email Archives and a discussion started on
6/14/2013 by Google Developer Relations person Shawn Simister[1] first
proposed this property. There is large thread there about licensing, ending
with Micru having an unanswered question to Shawn about how Freebase can
manage its license since it mixes CC-0 and CC-BY?
Off-topic: this thread is from before Denny announced that he was
going to Google, I believe, is that correct? Whatever happens with
licensing, and regarding Wikidata's CC0, I hope that it wasn't engineered
so that Google could profit from Wikidata. I concede that this thought is
mostly from paranoia, and disagreeing with a lot of Google's politics and
tactics in the past.
[1]
https://plus.google.com/+ShawnSimister
Maximilian Klein
Wikipedian in Residence, OCLC
+17074787023
------------------------------
*From:* wikidata-l-bounces(a)lists.wikimedia.org <
wikidata-l-bounces(a)lists.wikimedia.org> on behalf of Gerard Meijssen <
gerard.meijssen(a)gmail.com>
*Sent:* Monday, November 11, 2013 11:27 AM
*To:* WikiData-l
*Subject:* Re: [Wikidata-l] Wikidata-Freebase mappings published under
CC0
Hoi,
If I understand you well, what you propose is adding links that are
similar to what we already do to VIAF and so many others. Using data from
Freebase is a tantalising option. Is there agreement and a license that
allows for this?
Thanks,
GerardM
Op 11 nov. 2013 19:35 schreef "Denny Vrandečić" <vrandecic(a)google.com>om>:
Hello all,
as you know, I have recently started a new job. My mission to get
more free data out to the world has not changed due to that, though.
Thus, I am happy to point you today to a step in this direction. We
have created a mapping of Wikidata Qids to Freebase Mids, and are
publishing it under CC0, so that anyone can use it in any way they want.
The file contains about 2 Million mappings.
The download and all further data is available here:
<
https://developers.google.com/freebase/data#freebase-wikidata-mappings>
In particular, I hope that the data will be uploaded to Wikidata. We
also plan to upload the data to Freebase. The two-way links will ensure
that systems using either knowledge base can easily merge data, go from one
to the other, enrich data with each other, etc. We opted to first publish
the mappings standalone, to make clear that they are under CC0.
The mapping is created based on the Wikidata dumps from end of
October. Wikidata Items are matched with Freebase Topics based on their
respective links to Wikipedia. Each mapping says that there have been no
disagreeing Wikipedia-Links and at least two agreeing Wikipedia-Links, so
the data should be very clean. Furthermore, the mappings are sorted by the
number of agreeing Wikipedia-Links, so it is kinda sorted by relevance.
The data is in RDF format. To get the Mids as they are used in
Wikidata, the replace the namespace
http://rdf.freebase.com/ns/m.
with
/m/
The Wikidata Qids are using the Wikidata namespace, i.e. the Qids
themselves are concatenated to
http://www.wikidata.org/entity/
If anyone wants to take up the task to upload the data to Wikidata, I
can offer to help and answer questions and to help.
Cheers,
Denny
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