Wikidata:Property proposal/Lemmy community identifier

Lemmy community identifier

Originally proposed at Wikidata:Property proposal/Generic

   Done: Lemmy community ID (P11947) (Talk and documentation)

Description	name of the Lemmy community associated to this subject
Represents	Lemmy (Q84777032)
Data type	External identifier
Domain	item
Allowed values	([a-z0-9_]+(?:@[a-z0-9\.\-]+[a-z0-9]+)?)
Example 1	Android (Q94) → android@lemmy.world
Example 2	electronics (Q11650) → electronics@discuss.tchncs.de
Example 3	Linux (Q388) → linux@sopuli.xyz

Motivation

With Lemmy being a federated and decentralised alternative to microblogging and forum discussions, it's popularity is rising. I think that adding a property that'll make these communities more accessible might be a good idea. --CrystalLemonade (talk) 18:25, 3 July 2023 (UTC)

Special mention: Kbin (Q119976165). It's also an ActivityPub-based network software but diiffers from Lemmy in some ways.

Discussion

• @CrystalLemonade: I modified the proposal a little to match the general expectations of wikidata. Hope that's ok with you. Generally I think this should be done like Wikidata:Property proposal/subreddit was. Is there a way to map a a lemmy community id to a URL so we can link people to them? I think this would be best as an external identifier. BrokenSegue (talk) 05:55, 29 June 2023 (UTC)

  Lemmy instances can use their own definitions for a community created on the instance, for example, the default definition is community and the URL is instance.tld/c/communityname, but in the case of Kbin, the communities are defined as "magazines", and the URL is kbin.social/m/communityname which is the difference between instances.

  However, instances, by default can interact with each other, and a user of instance A (lemmy.world for example) can subscribe for a community hosted on instance B (kbin.social for example), via having the community described like the following:

  kbin.social/m/android@lemmy.world .

  In a much more example-like form, it's

  instance-a.tld/c/communityname@instance-b.tld, and that's why I was initially leaning towards the String datatype, since it would hold the "universal" link to join the particular community, because if it's viewed on the local instance, there's also a notice on how a "remote" user can join the community, if their instance hasn't defederated themselves from the recipient instance.

  Instance-local URLs would also need to signed on, but using the user's local instance with the universal community identifier, one can subscribe to a remote community to view and create new posts. CrystalLemonade (talk) 11:07, 29 June 2023 (UTC)

  is there not a central lemmy instance we can link to like the way we do for mastodon? BrokenSegue (talk) 16:26, 29 June 2023 (UTC)

  There's a central page that lists the various instances, and that is join-lemmy , which lists the instances based on the popularity, but those can also be controversial as well.

  But there are the documentation for how Lemmy instances work:

  https://join-lemmy.org/docs/users/01-getting-started.html

  https://join-lemmy.org/docs/administration/federation_getting_started.html

  If you're not logged in to an instance, you will get a message like this on the sidebar.

  Hopefully these will be useful. CrystalLemonade (talk) 17:31, 29 June 2023 (UTC)

  Could you fill out rest of the proposal? Trade (talk) 19:14, 30 June 2023 (UTC)

  @CrystalLemonade: What about linking to e.g. https://lemmy.world/c/$1 so it'd be https://lemmy.world/c/android@lemmy.world ? That seems to reliably work for these examples? BrokenSegue (talk) 19:30, 30 June 2023 (UTC)

  I guess, in most cases, using the instance.tld/c/communitynameformat or even the instance.tld/c/communityname@instance.tldformat would work, but there are some cases, where the instance.tld/c/communityname@instance.tldformat just drops into an Error 404 page. For example, for Kbin, that formatting does not work, but I guess we can make it a special case for formatting I think.

  Kbin only seems to work with a local URL formatted like https://kbin.social/m/gaming but not https://kbin.social/m/gaming@kbin.social because it will return an Error 404 page.

  However, on remote URLs, an URL formatted like https://lemmy.world/c/gaming@kbin.social works just as it should with any universal identifier. CrystalLemonade (talk) 21:00, 30 June 2023 (UTC)

  no i meant a URL like https://lemmy.world/c/gaming@kbin.social would work BrokenSegue (talk) 00:06, 1 July 2023 (UTC)

  yeah, absolutely. CrystalLemonade (talk) 01:03, 1 July 2023 (UTC)

  Also, additionally, I would add as info, that while Kbin (Q119976165) uses ActivityPub, it's different than the rest of the "original" Lemmy instances, and probably that's why it's a bit different than the Lemmy instances, so I think that the instance.tld/c/communityname@instance.tldformat will absolutely work for Lemmy server instances. I'll update the examples to match with this, but I'm going to add Kbin as a "special" mention that also could work with a similar, but different property, like "Kbin community identifier" or something like it. --CrystalLemonade (talk) 18:17, 3 July 2023 (UTC)

•  Support in case that's unclear. BrokenSegue (talk) 00:18, 4 July 2023 (UTC)
•  Support – Shisma (talk) 17:40, 21 July 2023 (UTC)
•  Support – There can be multiple communities related to one subject; maybe this should be specified to lemmy.world and/or it should be a norm that the one with most real subscribers is linked; also those should be hyperlinks (e.g. linux@lemmy.world). --Prototyperspective (talk) 16:06, 10 August 2023 (UTC)

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• @CrystalLemonade, BrokenSegue, Trade, Shisma, Prototyperspective:  Done: Lemmy community ID (P11947). Regards Kirilloparma (talk) 01:05, 14 August 2023 (UTC)