Wikidata:Property proposal/Public presentation

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Public presentation[edit]

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   Under discussion
Descriptiontime of the first public presentation of a subject by the creator
Data typePoint in time
Domainconcept car (Q850270), type of manufactured good (Q22811462)
Example 1Renault EZ-Ultimo (Q56878821) → 2018-10-02
Example 2Samsung Galaxy S9 (Q50102300) → 2018-02-25
Example 3Bombardier Global 6500 (Q54370182) & Bombardier Global 5500 (Q57078862) → 2018-05-27
Example 4Bavaria R55 (Q57078990) → 2018-01-20
Sourcepress releases
See alsodate of official opening (P1619), publication date (P577)


date of official opening (P1619) and publication date (P577) are both for other types of works and also signify the actual beginning of public use, while this proposed property is intended to be used for the official announcement of the mere existence of the work. MB-one (talk) 10:02, 8 October 2018 (UTC)


significant event (P793) with qualifiers is currently used for this. But it only really makes sense to use it, if there's a separate wikidata item just for the presentation event, which isn't always the case. This property is intended to be more equivalent to first flight (P606), time of spacecraft launch (P619) or date of official opening (P1619). --MB-one (talk) 17:54, 9 October 2018 (UTC)
  • Symbol support vote.svg Support David (talk) 06:57, 9 October 2018 (UTC)
  • This seems to be a useful addition, however I think it could be even broader, such as an announcement date or introduction date for a new event, building (especially good for buildings that are being built and don't have a start or public opening date yet), or law (Tax Cuts and Jobs Act of 2017 (Q42955478) -> 2017-11-02 . So I will Symbol support vote.svg Support it as "date of first public presentation/announcement" (announcement can also be in the alias). Further it should have a single value constraint as there can only be 1 first presentation. Germartin1 (talk) 07:34, 10 October 2018 (UTC)
Of course it could be open for more widely usa. --MB-one (talk) 13:04, 15 October 2018 (UTC)
  • Symbol oppose vote.svg Oppose, per ArthurPSmith. Use significant event (P793) with point in time (P585) qualifier, even if there's no dedicated item for the particular item's presentation event, as the property is intended for. --Yair rand (talk) 23:24, 10 October 2018 (UTC)
    • @ArthurPSmith, Yair rand: The problem with significant event (P793) is that it can have as value the specific event or a generall occurence. Let's look at the new Pixel 3 (Q57179556), let's use significant event (P793), do we put as a value Google I/O (Q668984), Google I/O 2018 (doens't exist yet) or just presentation (Q604733) or announcement (Q567303) (announcement should have have series ordinal (P1545)=1 so it's clear that it's the first announcement and not just any), or even both. How do you query it??? Having a simple property "date of first public presentation/annoucement" will make it much easier Germartin1 (talk) 09:01, 11 October 2018 (UTC)
      • I'm sure this has come up before in other contexts. Maybe we should split significant event (P793) into two, one to point to specific event items, and one to point to generic types of event? In any case I don't think we need special properties for each generic event type. The ones mentioned above were created early on and probably wouldn't be approved now. ArthurPSmith (talk) 18:23, 11 October 2018 (UTC)
      • (edit conflict) @Germartin1: Hm, this is a good point, but it's applicable to essentially all the varied uses of P793. The presence of using specific instances of more general classes in P793 breaks use of qualifiers like P1545, and makes querying more difficult in general. Perhaps we should just eliminate use of such instances, and link the more specific item by a qualifier? I don't think working around it for one specific type by creating a new property is a good idea, but this is something that needs to be fixed somehow. --Yair rand (talk) 20:27, 11 October 2018 (UTC)
  • Symbol support vote.svg Support Nepalicoi (talk) 17:10, 11 October 2018 (UTC)