Wikidata:Property proposal/is metaclass for

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is metaclass for[edit]

Return to Wikidata:Property proposal/Generic

   Under discussion
Descriptionall instances of the subject are subclasses of the object
Data typeItem
Example 1aircraft model (Q15056995)aircraft (Q11436)
Example 2cell type (Q189118)cell (Q7868)
Example 3ship type (Q2235308)ship (Q11446)
See alsometasubclass of (P2445)

Motivation[edit]

It seems to me like the relationship between a metaclass and the class it's about is important. Being more explicit can help us to get a more clear and consistent ontology. I prefer this way of having the relationship as it explains people who go to the item of the metaclass what it's about and it seems to me that's more necessary then explaining what the other item is about. ChristianKl❫ 17:42, 22 March 2020 (UTC)

Discussion[edit]

--Micru (talk) 21:46, 24 August 2014 (UTC) Tobias1984 (talk) TomT0m (talk) Genewiki123 (talk) Emw (talk) 03:09, 9 September 2014 (UTC) —Ruud 16:15, 9 December 2014 (UTC) Emitraka (talk) 14:32, 14 October 2015 (UTC) Bovlb (talk) 19:10, 21 October 2015 (UTC) Peter F. Patel-Schneider (talk) 22:21, 23 October 2015 (UTC) ArthurPSmith (talk) 15:51, 5 November 2015 (UTC) --Daniel Mietchen (talk) 20:53, 3 January 2016 (UTC) --Harmonia Amanda (talk) 22:00, 27 February 2016 (UTC) --Lechatpito (talk) --Andrawaag (talk) 14:42, 13 April 2016 (UTC) --ChristianKl (talk) 16:22, 6 July 2016 (UTC) --Cmungall Cmungall (talk) 13:49, 8 July 2016 (UTC) Cord Wiljes (talk) 16:53, 28 September 2016 (UTC) DavRosen (talk) 23:07, 15 February 2017 (UTC) Vladimir Alexiev (talk) 07:01, 24 February 2017 (UTC) Pintoch (talk) 22:42, 5 March 2017 (UTC) Fuzheado (talk) 14:43, 15 May 2017 (UTC) YULdigitalpreservation (talk) 14:37, 14 June 2017 (UTC) PKM (talk) 00:24, 17 June 2017 (UTC) Fractaler (talk) 14:42, 17 June 2017 (UTC) Andreasmperu Diana de la Iglesia Jsamwrites (talk) Finn Årup Nielsen (fnielsen) (talk) 12:39, 24 August 2017 (UTC) Alessandro Piscopo (talk) 17:02, 4 September 2017 (UTC) Ptolusque (.-- .. -.- ..) 01:47, 14 September 2017 (UTC) Gamaliel (talk) --Horcrux (talk) 11:19, 12 November 2017 (UTC) MartinPoulter (talk) Bamyers99 (talk) 16:47, 18 March 2018 (UTC) Malore (talk) Wurstbruch (talk) 22:59, 4 April 2018 (UTC) Dcflyer (talk) 07:50, 9 September 2018 (UTC) Ettorerizza (talk) 11:00, 26 September 2018 (UTC) Ninokeys (talk) 00:05, 5 October 2018 (UTC) Buccalon (talk) 14:08, 10 October 2018 (UTC) Jneubert (talk) 06:02, 21 October 2018 (UTC) Yair rand (talk) 00:16, 24 October 2018 (UTC) Tris T7 (talk) ElanHR (talk) 22:05, 26 December 2018 (UTC) linuxo Gq86 Gabrielaltay Liamjamesperritt (talk) 08:44, 21 June 2019 (UTC) ZI Jony Ivanhercaz (Talk) 11:07, 15 July 2019 (UTC) Gaurav (talk) 22:39, 24 August 2019 (UTC) Meejies (talk) 04:38, 29 August 2019 (UTC) Iwan.Aucamp SilentSpike (talk) Tfrancart (talk) Luis.ramos.pst.ag TiagoLubiana (talk) 15:12, 2 December 2019 (UTC) Albert Villanova del Moral (talk) 15:43, 6 February 2020 (UTC) Clifflandis (talk) 15:10, 18 February 2020 (UTC) --Tinker Bell 16:48, 23 March 2020 (UTC)

Pictogram voting comment.svg Notified participants of WikiProject Ontology ChristianKl❫ 17:53, 22 March 2020 (UTC)

  • Symbol support vote.svg Support --Tinker Bell 16:50, 23 March 2020 (UTC)
  • Symbol support vote.svg Support Good idea, yes I think this has been missing. ArthurPSmith (talk) 18:20, 23 March 2020 (UTC)
  • Symbol support vote.svg Support --SilentSpike (talk) 12:47, 24 March 2020 (UTC)
  • Symbol oppose vote.svg Oppose use subclass of (P279) instead. --- Jura 13:15, 27 March 2020 (UTC)
  • @Peter F. Patel-Schneider: what do you think? --- Jura 17:09, 3 April 2020 (UTC)
  • Symbol neutral vote.svg Neutral There is something to be said for this proposal, but I think that there is not enough said about the property here. What makes a class a metaclass for another? Is it just the constraint stated in the proposal? If so, why not just add the constraint directly (perhaps with the addition of the ability to have named constraints)? If not, what else goes into the metaclass relationship? Adding a new property that affects the ontological backbone of Wikidata requires a full examination of how it will affect Wikidata, in my opinion. And then there should be an examination of the current content of Wikidata, or at least a good part of it, to see where this property should be added and what parts of Wikidata should be changed to align with the proposed change. Peter F. Patel-Schneider (talk) 17:43, 3 April 2020 (UTC)
  • Pictogram voting comment.svg Comment metasubclass of (P2445) was just added to "see also". Ironically its name includes "subclass". If it was actually used, we would probably have to change queries from P279* to (wdt:P279/wdt:P2445)* or add more P279 --- Jura 18:34, 4 April 2020 (UTC)
    • Hmm. Yet another sub-property that should be set up better. It would be nice to have [...] a constraint added to [express the complex meaning of this property]. Edit: Ooops, it appears that metasubclass of (P2445) isn't supposed to mean what I thought its name implied so the required constraint is more complex than I had thought, thus the changes signalled by the []s. Peter F. Patel-Schneider (talk) 23:53, 4 April 2020 (UTC)