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Category Archives: Wikidata

The Big Ones

Update: After fixing an import error, and cross-matching of BNF-supplied VIAF data, 18% of BNF people are matched in Wikidata. This has been corrected in the text. My mix’n’match tool holds a lot of entries from third-party catalogs – 21,795,323 at the time of writing. That’s a lot, but it doesn’t cover “the big ones” – […]

ORCID mania

ORCID is an increasingly popular service to disambiguate authors of scientific publications. Many journals and funding bodies require authors to register their ORCID ID these days. Wikidata has a property for ORCID, however, only ~2400 items have an ORCID property at the moment of writing this blog post. That is not a lot, considering Wikidata […]


tl;dr: I wrote a quiz interface on top of a MediaWiki/WikiBase installation. It ties together material from Wikidata, Commons, and Wikipedia, to form a new educational resource. I hope the code will eventually be taken up by a Wikimedia chapter, as part of an OER strategy. The past There have been many attempts in the WikiVerse to […]

Mix’n’match post-mortem

So this, as they say, happened. On 2016-12-27, I received an update on a Mix’n’match catalog that someone had uploaded. That update had improved names and descriptions for the catalog. I try to avoid such updates, because I made the import function so I do not have to deal with every catalog myself, and also because […]

All your locations are belong to us

A recent push for a UK photography contest reminded me of an issue I have begrudged for a quite a while. On the talk page for that contest, I pointed to several tools of mine, dealing with images and locations. But they only show aspects of those, like “Wikidata items without images”. What about the others? WDQS can show maps of […]

Livin’ on the edge

A few days ago, Lydia posted about the first prototype of the new structured data system for Commons, based on Wikidata technology. While this is just a first step, structured data for Commons seems finally within reach. And that brings home the reality of over 32 million files on Commons, all having unstructured data about them, in the […]

WDQ, obsolete?

Since a few years, I run the WikiData Query tool (WDQ) to provide a query functionality to Wikidata. Nowadays, the (confusingly similarly named) SPARQL-based WDQS is the “official” way to query Wikidata. WDQS has been improving a lot, and while some of my tools still support WDQ, I deliberately left that option out of new […]

First image, good image?

For a while now, Wikimedia pages (usually, Wikipedia articles) have a “page image”, an image from that page used as a thumbnail in article previews, e.g. in the mobile app. While it is not entirely clear to me how this is image is chosen, it appears to be the first image of the article in […]

A week of looking at women

Images and their use in the WikiVerse have always been a particular interest of mine, on Wikipedia, Commons, and of course, Wikidata. Commons holds the files and groups them by subject, author, or theme; Wikidata references images and files for key aspects of a subject; and Wikipedia uses them to enrich texts, and puts files […]

Of cats and pets

CatScan is one of these workhorse tools that are familiar to many Wikimedia users, all the way back to the toolserver. Its popularity, however, has also caused problems with reliability time and again. As Labs became usable, I added QuickIntersection to the mix, allowing for a quicker and more reliable service at the expense of […]