federated properties

What is Wikibase “Federated Properties” in 2025

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I recently wrote a post looking at the history of the Wikibase “Federated Properties” feature. While at Wikimania 2025 the topic of federation came up a few times, particularly given the current discussions ongoing on the Wikidata project chat page including discussions about wikicite, and the recent Wikidata graph split.

All the code for the “Federated Properties” feature still exists in Wikibase code, despite a ticket being open on phabricator to potentially delete it. And it turns out that the configuration for it still exists on wikibase.cloud too, where the feature was initially presented to the communities to try out.

So with a little bit of sneaky “hacking”, I can try to summarize the current / final state of the “Federated Properties” feature, after development during the MVP stopped some years ago.

This also means you can still try out the feature on your own wiki using the setting.

$wgWBRepoSettings['federatedPropertiesEnabled'] = true;

Creating a local property

Firstly, we need a property, and the creation workflow is exactly the same as on a normal Wikibase.

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What was Wikibase “Federated Properties”

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The “Federated Properties” feature allows / allowed a local Wikibase instance to access and utilise properties directly from a remote Wikibase, primarily Wikidata. Its primary purpose is to enable partial federation between a local Wikibase and Wikidata, broadening the base of available data without needing to create a property set from scratch.

I’m split between using the present and past tense here, as all of this code still exists within the Wikibase extension, however no one has used it since 2022, and it certainly doesn’t seem to be on the short or medium term (or maybe even long term) roadmaps.

This overview comes from the Wikibase – Federated Properties Phabricator project, which I’ll quote the whole of here for prosperity.

Federated Properties v2 (2021)
An initiative to give users the ability to access remote properties from their local Wikibase and use them in combination with custom local properties. The primary use case is enabling partial federation between a Wikibase and Wikidata. This version of the feature will allow you to:

  • Opt-in to use Wikidata’s properties in addition to your own custom local properties
  • Create and view statements about local entities that contain both local and federated properties
  • Query your Wikibase using both local and federated properties

Federated Properties v1 (2020-2021)
An initiative to give users the ability to access remote properties from their local Wikibase (no local properties were possible in this MVP). This version was launched in the Wikibase Spring Release in May 2021.

As far as I remember, the project died with v2, and I don’t even recall if v2 really saw the light of day outside WMDE internal testing and or hidden testing on wikibase.cloud.

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Tech Lead Digest – Q3/4 2021

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This entry is part 5 of 5 in the series Tech Lead Digest (wmde)

It’s time for the 5th instalment of my tech lead digest posts. I switched to monthly for 2 months, but decided to back down to quarterlyish. You can find the other digests by checking out the series.

🧑‍🤝‍🧑Wikidata & Wikibase

The biggest event of note in the past months was WikidataCon 2021 which took place toward the end of October 2021. Spread over 3 days the event celebrated Wikidatas 9th birthday. We are still awaiting the report from the event to know how many folks participated, and recordings of talks will likely not be available until early 2022. At which point I’ll try to write another blog post.

Just before WikidataCon the updated strategy for Linked Open Data was published by Wikimedia Deutschland which includes sub-strategies for Wikidata and the Wikibase Ecosystem. This strategy is much easier to digest than the strategy papers published in 2019 and I highly recommend the read. Part of the Wikidata strategy talks about “sharing workload” which reminds me of some thoughts I recently had comparing Wikipedia and Wikidata editing. Wikibase has a focus on Ecosystem enablement, which I am looking forward to working on.

The Wikibase stakeholder group continues to grow and organize. A Twitter account (@wbstakeholders) now exists tweeting relevant updates. Now with over 14 organizational members and 15 individual members, the budget is now public and the group is working on getting some desired features implemented. If you are an organization or individual working in the Wikibase space, be sure to check them out! The group recently published a prioritized list of institutional requirements, and I’m happy to say that some parts of the “Automatic maintenance processes and updating cascades should work out of the box” area that scored 4 have already been tackled by the Wikidata / Wikibase teams.

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WBStack setting changes, Federated properties, Wikidata entity mapping & more

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This entry is part 8 of 12 in the series WBStack

During the first 3 months of 2021, some Wikimedia Deutschland engineers, from the Wikidata / Wikibase team, spent some time working on WBStack as part of an effort to explore the WBaaS (Wikibase as a service) topic during the year, as outlined by the development plan.

We want to make it easier for non-Wikimedia projects to set up Wikibase for the first time and to evaluate the viability of Wikibase as a Service.

Wikibase 2021 Development plan

This has lead to a few new Wikibase features being exposed through the WBStack dashboard for sites that run on the platform. These features are primarily features developed by the Wikibase team in 2020 and 2021. The work also brought some other quality of life improvements for the settings pages.

Here is a quick rundown of what’s new and improved.

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