Welcome to the 400th Weekly Summary!

Here are some interesting Wikidata facts or queries collected by the community and related to the number 400:

• Item #400 is Jenna Jameson; Property #400 is platform (software), and Lexeme #400 is "vierhonderd" - Dutch for "four hundred". The QID for the natural number 400 is Q1535396. The QID for the year 400 is Q25621.
• The page ID 400 is Ludwig van Beethoven; the Wikidata page version ID 400 was a version of printer.
• The Greek philosopher Hypatia, one of the first women scientists, became head of the Neo-Platonist school at Alexandria, in 400 AD. We include her here in tribute to those working to reduce Wikidata's gender gap.
• Wikimedia Commons has 627 images taken with the Canon PowerShot A400 - you can see one on baritone saxophone.
• Map of things at an altitude of 400 m.
• Map of places with a population of 400 ± 5 (yellow) graduating to 400 ± 0 (red).
• From this query, Wikidata knows of 21 theatres, 15 cinemas, 11 sports venues, 11 event venues, and 9 ships having a maximum capacity of 400.
• Image grid of taxa with a highest observed lifespan of at least 400 years.
• Image grid of items with a mass of 400 kilograms and image grid of items with a mass of 400 grams.
• List of 400m distance sports events.
• 400 Ducrosa is a main-belt asteroid named after J. Ducros.
• List of items with an external ID equal to 400.
• Last but not least, 400 dahlias for Léa, Lydia and the other contributors to this list!

Events

• Past: Wikidata office hour on Telegram, January 22nd. Notes of the meeting
• Upcoming: WikiTuesday / Wikidata Talks Meetup in Istambul, Turkey, January 28th
• Upcoming: online meeting dedicated to organizers of Wikidata's 8th birthday, January 29th

Tool of the week

• Duplicate Item copies the current item (without descriptions or sitelinks) to a new item. This tool is useful for splitting items and for making sets of similar items. Recommended for experienced users.

Other Noteworthy Stuff

• New development roadmap for Wikidata and Wikibase for 2020
• OpenRefine usage survey 2020
• Wikidata has an entry in Google's new data search tool

Did you know?

• Newest properties:
  • General datatypes: attested as, category for files created with program, period of lactation, aperture
  • External identifiers: C64.COM ID, c64games.de ID, eu-football.info team ID, museum in Salzburg (AT) ID, fyyd podcast episode ID, Upper Austria Museum ID, WorldCat Identities ID, word in DEJ of RAE ID, HAL article ID
• New property proposals to review:
  • General datatypes: LiverTox Likelihood Score, dean, stated age in source, US Bureau of Prisons Register Number, located in the constituency, motherboard, WMF short URL, Recognition, recognized by, not recognized by, jurisdiction status, supported metadata, expansion, historic first, number of pins, number of pin positions, catalogue raisonné, Dose, value group number, external georeferencer URL, axis, Voting system, image revision-id, region within image, georeferencing data, based on tabular data, Number of active electronic terminals, associated with, translated title, position in sequence, Attribution text, food energy, madhhab, Maximum number of playable characters, Main deity, electron configuration, capital social, gained territory from, key col of, religion or world view, CMF identifier, masculine form, feminine form, menu items, food composition, IP address or range, featured in, lighting, general law, territorial entity ranking context, references, mentions named entity, hardiness
  • External identifiers: NASA active astronaut ID, VGMRips company ID, DSSTOX compound identifier, Roglo person ID, VGMRips system ID, Museu de Memes ID, Nobel API ID, VideoGamer.com game ID, Canmore object-type ID, Canmore maritime-type ID, GameRevolution game ID, TrueAchievements game ID, PARADISEC Catalog, ELAR ID, ChemSynthesis ID, Whaling History ID, ft.dk politician identifier, Ciência ID, 7digital United Kingdom artist ID, Ident.Nr., GoodRx, part number, Faculté des sciences de Nancy ID, MIC, UEFA referee ID, name-suggestion-index identifier, TrueAchievements series ID, Bollywood Hungama ID 2, Gamekult game ID
• Query examples:
  • The results of the Australian Triple J Hottest 100, 2019 music voting poll were published on 25 January 2019. See the results with associated music videos to watch.
  • Map of destinations from Wuhan Tianhe International Airport
  • 50 philosophers for which DBpedia and Wikidata state different date of birth (source)

Development

• More work on wb_terms migration
• Units support for quantity datatype (phab:T239474)
• Fix the link to rawgraphs.io from WDQS (phab:T222257)
• More work on showing messages related to permissions on the Wikidata Bridge
• Tainted references: fix minor alignment issues (phab:T243269, phab:T242212)
• Add a "remove warning" button to confirm a correct reference (phab:T234789)
• Preparing the ground for a unified component library for the Wikidata UI

You can see all open tickets related to Wikidata here. If you want to help, you can also have a look at the tasks needing a volunteer.

Monthly Tasks

• 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!