Just a quick heads up that this is expected to go live next week. Since nobody
responded to the original announcement, we don't expect much trouble.
But if you are processing WKT literals from Wikibase RDF output, you need to
check the version number, and parse the literals accordingly.
-------- Weitergeleitete Nachricht --------
Betreff: [Wikidata] upcoming change in RDF format data
Datum: Sun, 3 Apr 2016 11:02:04 +0300
Von: Stas Malyshev <smalyshev(a)wikimedia.org>
Antwort an: Discussion list for the Wikidata project.
<wikidata(a)lists.wikimedia.org>
Organisation: Wikimedia Foundation
An: Discussion list for the Wikidata project. <wikidata(a)lists.wikimedia.org>
Hi!
We are committing a patch that implements a change in RDF format output,
specifically how we output coordinates as WKT points.
If you do not use RDF format exports and specifically WKT coordinate
literals there, this change has no effect for you.
When we first implemented it, we chose to make it "Point(latitude
longitude)". Unfortunately, turns out the standard way in WKT is
Point(longitude latitude) and that's how most of the tools that
implement WKT format understand it. In general, geo-data formats are
split on this question, see
http://www.macwright.org/lonlat/. But WKT is
pretty universally in lon-lat camp, so we have to follow the established
practice.
As such, we are changing the WKT representation and we are bumping the
format version (reported as schema:softwareVersion on RDF dumps/exports)
from 0.0.1 to 0.0.2 so that the tools could adjust properly.
See more details in:
https://phabricator.wikimedia.org/T130049
Thanks,
--
Stas Malyshev
smalyshev(a)wikimedia.org
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