This is the Wikidata summary of the week before 2017-09-18.

• Upcoming: Wikidata Wahldaten Workshop 2017 – 30 September 2017 in Vienna, Austria
• Upcoming: Wikimedia Research Showcase
• Past: Wikidata workshop in Zurich (the slides of the speakers are linked on the page)
• Past: GLAMhack Wikidata workshop in Lausanne (see the slides of the Query Service introduction)
• Past: Wikidata workshop in Kolkata, India
• Bridging real and fictional worlds in Wikidata, by Martin Poulter
• Weekend at the Museum (of Brittany), by Envel Le Hir
• Wiki Loves Monuments und Wikidata, by SW
• The French Connection at the Wikimania 2017 Hackathon, by Envel Le Hir

• Wikidata ontology explorer: creates a tree of a class or property, shows common properties and statements
• Join the mysterious group of Wikidata:Flashmob who improve labels, or summon them on an item
• A breaking change to the wbcheckconstraints API output format was announced
• Q40000000 was created
• Improvements coming soon to Recent Changes
• Several new catalogs in Mix'n'Match incl. Encyclopædia Britannica, National Gallery artists and ArtCyclopedia

• Newest properties: United Nations Treaty Series Registration Number, Sefaria ID, ICD-10-CM, Encyclopedia of Australian Science ID, Indonesian Small Islands Directory ID, Cyworld ID, IPA Braille, category contains, Enciclopedia Italiana ID, United Nations Treaty Series Volume Number, National Criminal Justice ID, order of battle, Tyrolean Art Cadastre inventory ID, shelf life, UK Electoral Commission ID, LNB Pro A player ID, nLab ID, highest observed lifespan, Unicode hex codepoint, PACTOLS thesaurus ID, Bashkir encyclopedia (Russian version) ID, Bashkir encyclopedia (Bashkir version) ID
• Query examples:
  • Algorithms and the problems they solve (source)
  • Swiss items with article in exactly one of German-, French-, Italian-, and Romansh-language Wikipedias (source)
  • Popular gender-neutral given names (source)
  • Computer network protocols and their ports (source)
  • Software developers by number of software titles (source)
  • Spacecraft and what they were named after (source)
• Newest WikiProjects: WikiProject property constraints

• Worked more on the constraints gadget in order to make it also work for references and qualifiers
• Made progress on persistently storing edits for the new Lexeme entity type (next to items and properties)
• Worked on the RDF mapping for full URIs of external identifiers (phabricator:T121274)

You can see all open tickets related to Wikidata here.

• Add labels, in your own language(s), for the new properties listed above.
• Comment on property proposals: all open proposals
• Suggested and open tasks!
• Contribute to a Showcase item.
• Help translate or proofread the interface and documentation pages, in your own language!
• Help merge identical items across Wikimedia projects.
• Help write the next summary!