Property talk:P2445
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metasubclass of
relation between two metaclasses: instances of this metaclass are likely to be subclasses of classes that are instances of the target metaclass
relation between two metaclasses: instances of this metaclass are likely to be subclasses of classes that are instances of the target metaclass
| Data type | Item | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Domain | metaclasses (classes that have instances which are themselves classes) (note: this should be moved to the property statements) | |||||||||
| Allowed values | metaclasses (note: this should be moved to the property statements) | |||||||||
| Example | engine model (Q15057021) → engine family (Q15057020) product model (Q10929058) aircraft model (Q15056995) → aircraft family (Q15056993) aircraft family (Q15056993) → aircraft class (Q1875621) crop (Q235352) → plant life-form (Q2355817) isotope (Q25276) → chemical element (Q11344) dialect of a file format (Q57696248) → file format family (Q26085352) | |||||||||
| Source | examination of Wikidata queries (note: this information should be moved to a property statement; use property source website for the property (P1896)) | |||||||||
| Robot and gadget jobs | Some opportunities for this, or at least to come up with cases for humans to consider -- see below. However, the number of incidences of this property is likely to be quite limited. | |||||||||
| See also | is metaclass for (P8225), instance of (P31), subclass of (P279) | |||||||||
| Lists |
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| Proposal discussion | Proposal discussion | |||||||||
| Current uses |
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| Search for values |
[create Create a translatable help page (preferably in English) for this property to be included here]
Scope is as main value (Q54828448): the property must be used by specified way only (Help)
List of violations of this constraint: Database reports/Constraint violations/P2445#Scope, hourly updated report, SPARQLDeletion discussion
[edit]Archived at Wikidata:Requests_for_deletions/Archive/2017/Properties/1#metasubclass_of_(P2445), closed as no consensus to delete. --Yair rand (talk) 21:45, 16 January 2018 (UTC)
misuse of this property
[edit]There appears to be a lot of misuse of this property. The description says that instances of one are supposed to be subclasses of instances of the other. But there are quite a few situations like aircraft model (Q15056995) and aircraft family (Q15056993) where the two metaclasses necessarily have disjoint instances. I'm going to go through all the uses of this property and fix them up. Peter F. Patel-Schneider (talk) 15:55, 18 June 2024 (UTC)
Analysis of metasubclass of links
As of 19 June 2024 there were 64 main and 7 qualifier links for metasubclass of (P2445). All the qualifier links are examples and all of these are either not in Wikidata or are incorrect.
Of the 64 main links, at most 10 were valid. The other ones are incorrect for various reasons. There are some situations where the link appears to be reasonable but turn out to be modelling errors, notably product categories that are also products.
Inst contains number of instances of Meta
Common contains number of instances of Meta that are also instances of Super
Subs contains number of instances of Meta that are also subclasses of instances of Super
MOrder class order of Meta
SOrder class order of Super
-> Meta is an instance of Super
=> Meta is a subclass of Super
Meta, MetaLabel give subject of metasubclass of link
Super, SuperLabel give object of metasubclass of link
Codes contains codes for reasons that the relationship is invalid
I Meta is an instance of Super
S Meta is a subclass of Super
O Meta has a different order than Super (using only correct order)
C Meta or Super is not a metaclass
D Deprecated comment on Meta or Super
X Super is unknown value
E Meta and Super have no instances
* - based on meta and super descriptions but relationship not in Wikidata, may have been added to Wikidata during analysis
Code Inst Common Subs MOrder SOrder -> => Meta MetaLabel Super SuperLabel
OC* 103217 98416 99623 Q63981612 product category Q2424752 product
O 98011 363 10124 2 3 Q10929058 product model Q811701 model series
O 10519 204 6459 2 2/3/4 Q15056995 aircraft model Q15056993 aircraft family
O 7075 0 1540 2 3 Q15142894 weapon model Q15142889 weapon family
O 0 0 0 2 2/3 Q124054999 combat aircraft model Q124054738 combat aircraft family
O 133 0 0 2 3 Q124056273 artillery model Q124056256 artillery family
O 131 0 13 2 3 Q22704163 firearm model Q124054676 firearm family
O 0 0 0 2 3 Q42314054 ammunition model Q42314051 ammunition family
O 1 0 0 2/3 3 Q104758804 torpedo model Q124054628 torpedo family
O 514 0 20 2 3 Q18487055 missile model Q18487018 missile family
O 593 1 502 2 2/3 Q100710213 combat vehicle model Q100709275 combat vehicle family
O 1676 0 0 2 2 Q23039057 bus model Q56697263 bus family
O 3129 3 3 2/3 2 Q22999537 vehicle family Q3231690 automobile model
S 1 1 1 2 2 1 Q104758804 torpedo model Q15142894 weapon model
S 1 1 1 3 2 1 Q104758804 torpedo model Q15142894 weapon model
D 0 0 0 3 3 Q124056266 artillery model series Q124056256 artillery family
D 0 0 0 3 3 Q124054879 ammunition model series Q42314051 ammunition family
D 0 0 0 3 3 Q124054897 firearm model series Q124054676 firearm family
D 0 0 0 3 3 Q124054933 missile model series Q18487018 missile family
D 0 0 0 3 3 Q124054944 torpedo model series Q124054628 torpedo family
D 0 0 0 3 3 Q124054888 combat vehicle model series Q124054676 firearm family
D* 0 0 0 3 2/3 Q124054994 combat aircraft model series Q124054738 combat aircraft family
I 0 0 0 1 Q105575131 History by subject in Saudi Arabia Q21146257 type
C 0 0 0 Q105575128 History by subject in Saudi Arabia Q200801 topic
C 0 0 0 Q105575122 History by time in Saudi Arabia Q11471 time
C 0 0 0 Q105575125 History by place in Saudi Arabia Q17334923 physical location
D 0 0 0 Q105575134 History by event in Saudi Arabia Q10290214 event
C 0 0 0 Q105582463 heritage of Saudi Arabia Q30634609 heritage designation
C 0 0 0 Q105582463 heritage of Saudi Arabia Q914856 historic preservation
I 13 0 0 1 Q1001388 budget label Q107317889 type of record label
I 0 0 0 1 Q107317983 reissue label Q107317889 type of record label
I 0 0 0 1 Q107318520 jazz label Q107317889 type of record label
I 0 0 0 1 Q111450726 heavy metal label Q107317889 type of record label
I 0 0 0 1 Q114707507 reggae label Q107317889 type of record label
I 0 0 0 1 Q115548417 punk label Q107317889 type of record label
S 1 1 1 1 Q107428796 Wikimedia list of musical works by performer Q100775261 Wikimedia list of musical works
C 0 0 0 Q61338340 soundtrack album released on this record label Q29033193 album released on this record label
C 0 0 0 Q61507380 soundtrack album by this artist Q29035150 album by this artist
C 0 0 0 Q61511035 compilation album by this artist Q29035150 album by this artist
C 0 0 0 Q61565021 remix album by this artist Q29035150 album by this artist
C 0 0 0 Q82775187 musical work by this composer Q106796414 work by this creator
C 0 0 0 Q82775187 musical work by this composer Q111846649 work by this person
C 0 0 0 1 1 Q66712100 jazz musician playing this instrument Q66712069 instrumentalist playing this instrument
E 0 0 0 Q111590755 works written by this person Q106913988 item by creator
S 146 146 146 2/3 2/3 1 Q2585617 drug class Q17339814 group or class of chemical substances
S 140534 140534 140534 2/3 2/3 1 Q55640599 group of chemical entities Q72070508 group or class of chemical entities
6110 0 5781 2/3 2 Q12089225 mineral species Q12110334 mineral class
21 0 21 2/3 2 Q3965272 mineral subclass Q12110334 mineral class
201 0 55 2 2 Q1936581 mineral group Q3977918 mineral supergroup
127 0 115 2 2/3 Q429795 mineral variety Q12089225 mineral species
2 1 2 2 Q15852455 dog variety Q39367 dog breed
62 0 57 Q1865678 order Q13744019 class
103 0 75 Q12057445 alliance Q1865678 order
4 0 2 Q4812777 suballiance Q12057445 alliance
257 0 198 Q744745 association Q12057445 alliance
1 0 1 Q4354416 subassociation Q744745 association
C 0 0 0 1 Q116767711 Category:Gords by country Q88598 gord
O 0 0 0 Q8915887 Category:Gords in the Czech Republic Q116767711 Category:Gords by country
O* 0 0 0 Q57696248 dialect of a file format Q26085352 file format family
S 1 1 1 2 1 Q124413096 Pal element Q15831596 class of fictional entities
S* 20 0 0 2 Q1266830 Pokémon type Q15831596 class of fictional entities
S 34 34 34 2 1 Q4374872 battery format Q96251598 type of object
31 0 30 Q73060694 battery chemistry type Q96251598 type of object
instead use is metaclass for battery
S 115719 115719 115719 2 2 1 Q98961713 extinct taxon Q16521 taxon
X 30 2 Q3977918 mineral supergroup _:bn1388117
Peter F. Patel-Schneider (talk) 15:21, 21 June 2024 (UTC)
- I'm going to remove the incorrect links in the near future unless someone speaks up. Peter F. Patel-Schneider (talk) 16:22, 21 July 2024 (UTC)
- Done using QuickStatements Peter F. Patel-Schneider (talk) 14:03, 23 July 2024 (UTC)
description should be stronger
[edit]The English description says "relation between two metaclasses: instances of this metaclass are likely to be subclasses of classes that are instances of the target metaclass". Why the "likely"? It seems to me that the instances should all be subclasses of instances of the target if this property is being used correctly. Peter F. Patel-Schneider (talk) 21:11, 19 June 2024 (UTC)