Hello everyone,

In 2015 Wikimedia Germany published the Service Catgraph[1], a graph database of the categories of Wikipedias, as well as Deepcat[2] a gadget for Wikipedia users to search for articles in a category, including recursive subcategories, in the search page of Mediawiki.
Since 2018 this functionality is built in the search engine of Wikipedia as well as into the Advanced Search GUI.

Wikimedia will therefore sunset Catgraph as well as Deepcat. We plan to shut down the service end of January. Catgraph also powered other tools such as Catcycle[3] and Article List Generator[4], these will also stop working. If your wiki has deepcat enabled as a gadget or in your globar.js, or you have it in your common.js you should remove it and use the newer, built in 'deepcategory'.

Documentation for the new search-keyword can be found here:
Documentation for the new Graph-Database is available here:

 Michael for the project Technical Wishes at Wikimedia Germany

[1]: https://wikitech.wikimedia.org/wiki/Nova_Resource:Catgraph
[2]: https://de.wikipedia.org/wiki/Hilfe:Suche/Deepcat 
[3]: http://tools.wmflabs.org/render-tests/catcycle-dev/catcycle.py
[4]: https://tools.wmflabs.org/render/stools/alg?uilang=en

M. F. Schönitzer
Community Communication

Wikimedia Deutschland e. V. | Tempelhofer Ufer 23-24 | 10963 Berlin

Tel. (030) 219 158 26-0


Unsere Vision ist eine Welt, in der alle Menschen am Wissen der Menschheit teilhaben, es nutzen und mehren können. Helfen Sie uns dabei!


Imagine a world in which every single human being can freely share in the sum of all knowledge. Help us to achieve our vision!


Wikimedia Deutschland – Gesellschaft zur Förderung Freien Wissens e. V. Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 B. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.