Hi!

We are planning to change the prefix and associated URIs in RDF
representation for Wikidata from:

PREFIX wikibase: <http://wikiba.se/ontology-beta#>

to:

PREFIX wikibase: <http://wikiba.se/ontology#>

If you are using Wikidata Query Service, you do not have to do anything,
as WDQS already is using the new definition.

However, if you consume RDF exports from Wikidata or RDF dumps directly,
you will need to change your clients to expect the new URI scheme for
Wikibase ontology.
Also, if you're using Wikibase extension in your project, please be
aware that the RDF URIs generated by it will use this prefix after the
change. This is defined in repo/includes/Rdf/RdfVocabulary.php around
line 175:

self::NS_ONTOLOGY => self::ONTOLOGY_BASE_URI . "#",

The new data will have schema:softwareVersion "1.0.0" triple on the
dataset node[1], which will allow your software to distinguish the new
data format from the old one.

The task tracking the change is
https://phabricator.wikimedia.org/T112127. I will make another
announcement when the change is merged and deployed and the data
produced by Wikidata is going to change.

Please contact me (or comment in the task) if you have any questions or
concerns.

[1] https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format#Header
--
Stas Malyshev
smalyshev@wikimedia.org

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