Wikidata:Property proposal/property usage tracking category

property usage tracking category

   Done: property usage tracking category (P2875) (Talk and documentation)

Description	Item linking categories tracking a Wikidata property in client projects. Create a property for each type of usage category. See samples.
Data type	Item
Template parameter	N/A
Allowed values	subcategories of Category:Page using Wikidata data (Q15574247)
Example	image (P18) -> Category:Pages using Wikidata property P18 (Q15907809) Tracking: same Category:Local image same as Wikidata (Q16742292) Tracking: differences Category:Local image different from Wikidata (Q16742291) Tracking: usage Category:Pages using Wikidata property P18 (Q15907809) Tracking: local no, WD yes Category:No local image but image on Wikidata (Q16742293) Tracking: local yes, WD no Category:Local image but no image on Wikidata (Q16742294) Tracking: local no, WD no Category:No local image and no image on Wikidata (Q16742295)
Proposed by	Zolo (talk) 17:41, 7 January 2015 (UTC)

Discussion

As a stopgap as long as they is no built-in way to do it. Using categories to track property usage can be useful to check if a property properly used, if a deprecated property is still in use etc.--Zolo (talk) 17:41, 7 January 2015 (UTC)

I added a few (item based) categories to Template:Property documentation. I found at least 7 different kinds of tracking categories. --- Jura 21:31, 16 June 2015 (UTC)

•  Support. Zolo: I change it to item datatype. This would allow to move the category links out of the property documentation template. --- Jura 12:00, 18 November 2015 (UTC)
• How will this property cope with the 7 different kinds of tracking categories? --Pasleim (talk) 13:50, 22 March 2016 (UTC)
  • With a qualifier and a value for each one? An alternate solution could be to do a new one for each.
    --- Jura 22:43, 26 March 2016 (UTC)
  • The last solution seems to fit better into the current structure. I updated the proposal accordingly.
    --- Jura 07:14, 25 April 2016 (UTC)
•  Support property. I don't see a need to track all of the subcategories, so  Oppose for that purpose i.e. this should have a unique constraint on it. --Izno (talk) 11:35, 24 May 2016 (UTC)

@Zolo, Jura1, Pasleim, Izno:  Done. There is at least support for this property linking to the top category. For now, I added a single value constraint, but its removal can be discussed on the property talk page. --Srittau (talk) 15:24, 29 May 2016 (UTC)

• Actually, the revised proposal was for 6 or 7 such properties. Each would have had a single value constraint. I don't think there is something like "subcategories" on Wikidata and every Wikipedia has different views on what is a subcategory of what. I think the "main category" property is already being used for in the way P2875 would be used.
  --- Jura 15:51, 29 May 2016 (UTC)
• As there doesn't seem to be a lot of interest for a single category (P2875), I think we should delete it.
  --- Jura 16:20, 29 May 2016 (UTC)