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Wikidata:Property proposal/Sister projects

< Wikidata:Property proposal

See alsoEdit

This page is for the proposal of new properties.

Before proposing a property

  1. Check if the property already exists by looking at Wikidata:List of properties (research on manual list) and Special:ListProperties.
  2. Check if the property was previously proposed or is on the pending list.
  3. Check if you can give a similar label and definition as an existing Wikipedia infobox parameter, or if it can be matched to an infobox, to or from which data can be transferred automatically.
  4. Select the right datatype for the property.
  5. Start writing the documentation based on the preload form below and add it in the appropriate section.

Creating the property

  1. Once consensus is reached, change status=ready on the template, to attract the attention of a property creator.
  2. Creation can be done 1 week after the proposal, by a property creator or an administrator.
  3. See steps when creating properties.

  On this page, old discussions are archived. An overview of all archives can be found at this page's archive index. The current archive is located at 2019/07.











Wikimedia IncubatorEdit

Wikimedia CommonsEdit

image extracted fromEdit

   Ready Create
Descriptionsource this image was cropped from
Data typeCommons media file
Template parameter1= in c:Template:extracted from
Domaincropped images on Commons
Example 1File:" 13 - Italian sport car - Alfa Romeo 4C rear spoiler carbon fiber.jpgFile:Geneva MotorShow 2013 - Alfa-Romeo 4C red rear.jpg
Example 2File:"Jobs, baby, jobs!" (2959819547) (cropped).jpgFile:"Jobs, baby, jobs!" (2959819547).jpg
Example 3File:"First Man" Premiere at NASM (NHQ201810040122) (cropped).jpgFile:"First Man" Premiere at NASM (NHQ201810040122).jpg
Example 4File:"S.F.P.D. POLICE LINE DO NOT CROSS" fence sign at 2008 Olympic Torch Relay in SF - Embarcadero 22 (cropped).JPGFile:2008 Olympic Torch Relay in SF - Embarcadero 22.JPG
Robot and gadget jobsadd to c:Category:Extracted images (currently 229,701)


Seems to be a popular usecase at Commons (Add your motivation for this property here.) --- Jura 11:42, 17 June 2019 (UTC)


  •   Support - basically a "source" for the file. --DannyS712 (talk) 05:41, 25 June 2019 (UTC)
  •   Oppose unless I misunderstand. Where do you plan to apply this property? To a Wikidata item? If so, which? The listed examples are Files on Commons, where Wikidata properties cannot be applied. If you are proposing this as something for the Structured Data section on Commons, you will need to propose that on Commons. --99of9 (talk) 06:14, 12 July 2019 (UTC)
    • No, properties need to be created on Wikidata. --- Jura 06:17, 12 July 2019 (UTC)
      • Can you point me to either documentation or an example of a property that (only?) works on Commons but has been created here. --99of9 (talk) 06:28, 12 July 2019 (UTC)
      • digital representation of (P6243), Commons quality assessment (P6731). There are no properties that were created only on Commons. --- Jura 06:31, 12 July 2019 (UTC)
        • Ok thanks, those are good comparable examples. I've struck my oppose. So the idea is to make properties here that will one day be built into Structured Data on Commons? It seems a bit strange that the decisions are here - perhaps we should have some kind of echo noticeboard letting them know about proposals that will mainly affect them. --99of9 (talk) 07:05, 12 July 2019 (UTC)
          • Ultimately, it's up to them to decide if and how they actually use it. For now, they seem to want to do most things with a single property ;) --- Jura 08:26, 12 July 2019 (UTC)
  •   Support Yes, this will be needed for Structured Data on Commons. But it may better to make a list of request creation as a batch. There is a discussion on Commons: c:Commons:Structured data/Properties table. Regards, Yann (talk) 09:32, 12 July 2019 (UTC)

Jheald (talk) 06:27, 17 August 2014 (UTC) Micru (talk) 07:20, 17 August 2014 (UTC) Andy Mabbett (Pigsonthewing); Talk to Andy; Andy's edits 15:41, 17 August 2014 (UTC) Sannita - not just another sysop 12:50, 18 August 2014 (UTC) Susannaanas (talk) 08:05, 19 August 2014 (UTC) Mushroom (talk) 12:02, 21 August 2014 (UTC) I do think Commons is the better place to talk about this. Multichill (talk) 18:50, 21 August 2014 (UTC) Jarekt (talk) 04:38, 3 September 2017 (UTC)  徵國單  (討論 🀄) (方孔錢 💴) 11:23, 14 November 2017 (UTC) Mike Peel (talk) 22:50, 12 May 2018 (UTC) Yann (talk) 23:27, 7 July 2018 (UTC) John Samuel (talk) 10:10, 22 September 2018 (UTC) 99of9 (talk) 06:27, 12 July 2019 (UTC)

  Notified participants of WikiProject Commons --99of9 (talk) 07:05, 12 July 2019 (UTC)

  •   Support nice one on one mapping with the template. Multichill (talk) 14:41, 12 July 2019 (UTC) image IDEdit

   Under discussion
Descriptionidentifier for an image from Geograph Britain and Ireland
RepresentsGeograph Britain and Ireland (Q1503119)
Data typeExternal identifier
Domainimages on Commons
Allowed values[1-9]\d*
Example 1File:Flatholm Lighthouse - - 900719.jpg → 900719
Example 2File:Wild Leek in front of Flatholm lighthouse - - 1529372.jpg → 1529372
Example 3File:Flatholm foghorn - - 1529370.jpg → 1529370
External linksUse in sister projects: [de][en][es][fr][it][ja][ko][nl][pl][pt][ru][sv][vi][zh][commons][species][wd].
Formatter URL$1
Robot and gadget jobsadd to c:Category:Images from Geograph Britain and Ireland


Allows to store the id on Commons in a structured way. The above proposal is for only. Maybe additional ones are needed. (Add your motivation for this property here.) --- Jura 10:01, 21 June 2019 (UTC)


  •   Comment The links already exist as sources of images, so what is the benefit of adding them again as a property? David (talk) 06:33, 22 June 2019 (UTC)
    • It's currently not included as structured data. A separate property allows to check for distinct values easily. --- Jura 10:06, 22 June 2019 (UTC)


related categoryEdit

   Ready Create
DescriptionWikimedia category is related to this item
Data typeItem
Example 1Art Garfunkel (Q4039)Category:Albums produced by Art Garfunkel (Q8232232) with qualifier of (P642)album produced by this record producer (Q29025420)
Example 2Art Garfunkel (Q4039)Category:Song recordings produced by Art Garfunkel (Q8761092) with qualifier of (P642)song by producer (Q56425213)
Example 3Harvard Law Review (Q1365125)Category:Works originally published in the Harvard Law Review (Q7006684) with qualifier of (P642)work, originally published in this periodical (Q29054826)
Example 4Benedict of Nursia (Q44265)Category:Saint Benedict churches (Q6562078) with qualifier of (P642)buildings by dedication to persons (religion) (Q19334621)
Planned usein local wiki infoboxes for autocategorization
See alsotopic's main category (P910), bodies of water basin category (P1200), category for people born here (P1464), category for people who died here (P1465), category for films shot at this location (P1740), category of people buried here (P1791), category of associated people (P1792), category for pictures taken with camera (P2033), category for recipients of this award (P2517), category for alumni of educational institution (P3876), category for employees of the organization (P4195), category for films in this language (P5996), category for members of a team (P6112), category for eponymous categories (P6186), member category (P6365)
Type constraint - subclass ofWikimedia category (Q4167836)
Wikidata projectWikidata:WikiProject Categories
Proposed byGhuron (talk)


See Wikidata talk:WikiProject Categories#Properties for categories. We have more than a dozen "category for" properties and I can easily come up with at least another dozen. Instead I suggest to create one generic "related category" property and use mandatory qualifier of (P642) in order to specify corresponding Wikidata metaclass (Q19361238). We will try and see how well it fits into existing infobox lua-modules in local wikis. I'll implement this in ru:Module:Wikidata and would be happy to assist other wikis. If all goes well, we can slowly deprecate properties from "see also" list (except for P910) starting with least frequently used. --Ghuron (talk) 08:01, 8 December 2018 (UTC)


  •   Support Nice idea, I wasn't aware we had all those metaclasses ready to use like that, that's really helpful. ArthurPSmith (talk) 14:04, 9 December 2018 (UTC)
    • BTW, I've created a small list, that contains existing metaclasses --Ghuron (talk) 11:46, 10 December 2018 (UTC)
  •   Oppose I don't think we should systematically support any categorization systems at Wikipedia. --- Jura 06:50, 10 December 2018 (UTC)
    • @Jura1: as I can see from "see also" we do systematically support wikipedia categorization (and some of the properties were requested by you :) I agree that this information is not very useful outside of wikimedia world, but wikipedias are still our largest consumer and maintaining those relations will help to expose wd-information in wikipedias, reveal and fix data errors. --Ghuron (talk) 11:46, 10 December 2018 (UTC)
      • If you want to support categories that are present across many wikis with a large number of uses, this is more reliably done with a separate properties. With this generic proposal, basically any category that exists on a wiki for one aspect can end up being linked with from items like United States of America (Q30). --- Jura 17:13, 10 December 2018 (UTC)
        • @Jura1: It is theoretically possible that people will create a lot of metaclasses that doesn't make much sense. But right now only a few people are interested in editing categories and we can use property constraint (P2302) one-of constraint (Q21510859) constraint to maintain a list of consensus metaclasses. Anyway we are not writing something in stone, if we will see that usage of this property is complete and utter garbage, we can always deprecate one. --Ghuron (talk) 18:29, 10 December 2018 (UTC)
          • That constraint wouldn't work. And people do add inverses when possible in a fairly systematic way. --- Jura 07:03, 11 December 2018 (UTC)
            • It is wiki nature to expect that most people would add meaningful content if they are gently guided in the right direction. Misunderstanding about inverse category properties happens even now (see [1] as an example) I do not see how proposed property will make it worse --Ghuron (talk) 08:55, 11 December 2018 (UTC)
    • Given that the items for the categories and for the people or other entities they relate to already exist, I don't see how we cannot "systematically support" this sort of thing??? And given particularly cases like Category:Saint Benedict churches (Q6562078) which is a category on 9 language wikipedias, this isn't something that's language-specific in general. ArthurPSmith (talk) 14:33, 10 December 2018 (UTC)
      • You can still query the categories with statements on the categories themselves. --- Jura 17:13, 10 December 2018 (UTC)
  •   Oppose I think we need a lot of properties (not just one) on this subject (Albums-Song recordings produced by-Works originally published in-churches and others) David (talk) 08:35, 10 December 2018 (UTC)
Ah, I think Jura's (obscure) point is that category combines topics (P971) on the category already takes care of this relation. Ghuron, why is that not sufficient? ArthurPSmith (talk) 18:58, 10 December 2018 (UTC)
@ArthurPSmith: as I said here if there would be a fast (aka non-sparql) way to retrieve category based on P971-values, none of those properties would be needed. Unfortunately Lua API does not expose this functionality and there is no activity for my phab:T185313 for almost a year. --Ghuron (talk) 19:25, 10 December 2018 (UTC)
That phab ticket looks like it would allow very general handling of inverse properties - but I thought there was some API support for it somewhere already. There's really nothing right now? ArthurPSmith (talk) 21:34, 10 December 2018 (UTC)
I do not see anything close to what is required here: mw:Extension:Wikibase Client/Lua --Ghuron (talk) 08:55, 11 December 2018 (UTC)
There is another relevant discussion that happens to be in ru-wiki. Right now we have Nobel Peace Prize (Q35637) category for recipients of this award (P2517) Category:Nobel Peace Prize laureates (Q5817200), but this category normally is used only for people, for organizations some local projects uses Category:Organizations awarded Nobel Peace Prizes (Q8704192). So in order to attach proper category for Nobel prize laureates, I will have to add both Q5817200 and 8704192 for P2517 (probably with some qualifiers). Proposed property can solve this issue in a bit more consistent way. --Ghuron (talk) 11:58, 28 December 2018 (UTC)