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@wikimedia.org Antwort an: Discussion list for the Wikidata project. wikidata@lists.wikimedia.org Organisation: Wikimedia Foundation An: Discussion list for the Wikidata project. wikidata@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,
wikidata-tech@lists.wikimedia.org