Property talk:P8379

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qualifier for this property
qualifier that is commonly used with this property. Note the difference to "allowed qualifiers constraint" (all that can be used) and "mandatory qualifier constraint" (all that should be used)

Represents	Wikidata qualifier (Q15720608)
Data type	Property
Domain	Wikidata property (Q18616576)
Usage notes	kvalifikator som kan settas for denne eigenskapen. Legg merke til forskjellen frå kvalifikatorar som kan brukast og obligatorisk kvalifikator.
Example	spouse (P26) → start time (P580) place of death (P20) → not applicable
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Chart by item creation date Database reports/Constraint violations/P8379 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 105 Main statement 95 90.5% of uses Qualifier 5 4.8% of uses Reference 5 4.8% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Type “Wikidata property (Q18616576)”: item must contain property “instance of (P31)” with classes “Wikidata property (Q18616576)” or their subclasses (defined using subclass of (P279)). (Help)

List of violations of this constraint: Database reports/Constraint violations/P8379#Type Q18616576, hourly updated report, SPARQL

Allowed entity types are Wikibase property (Q29934218): the property may only be used on a certain entity type (Help)

List of violations of this constraint: Database reports/Constraint violations/P8379#Entity types, hourly updated report

Value type “Wikidata qualifier (Q15720608)”: This property should use items as value that contain property “instance of (P31)”. On these, the value for instance of (P31) should be an item that uses subclass of (P279) with value Wikidata qualifier (Q15720608) (or a subclass thereof). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8379#Value type Q15720608, SPARQL

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8379#Scope, SPARQL

Item “property constraint (P2302)”: Items with this property should also have “property constraint (P2302)”. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8379#Item P2302, search, SPARQL

"List of qualifier"-query in property documentation template (see ^{top right corner of property talk pages})

The query used to time-out on some of the frequently used properties. For properties with many uses it now offers a query that checks only the first 0.5 - 1 million statements. --- Jura 12:22, 27 June 2020 (UTC)

use of "novalue"

For place of birth (P19) and place of death (P20), some qualifiers are used, but many aren't that frequent and some frequent ones aren't currently recommended AFAIK (e.g. country (P17) or located in the administrative territorial entity (P131) which should be on the item used as value, not as a qualifier -- some old bot story).

Accordingly, I set P8379 to novalue. --- Jura 12:22, 27 June 2020 (UTC)

value for date of birth (P569)

instance of (P31) seems to be the most frequently used, due to a bot tagging them with it.

• instance of (P31) is not a property that should be used as a qualifier.
• Even if the bot hadn't used P31 I don't think the "most frequent" one would be useful for manual editing.

Accordingly, I set this property to sourcing circumstances (P1480) which is occasionally useful. --- Jura 12:22, 27 June 2020 (UTC)

How many values? sample: spouse (P26)

Current situation:

Uses of P26	236,968
start time (P580)	34717
end time (P582)	21332
place of marriage (P2842)	2736
end cause (P1534)	1902
series ordinal (P1545)	727

I hestitated between adding start time (P580) or the first three of the above. --- Jura 12:43, 27 June 2020 (UTC)

Duplicate required qualifier constraint (Q21510856)?

Should these be copied or not? I skipped them for now --- Jura 12:43, 27 June 2020 (UTC)

Update qualifier suggestor to use this?

Currently, the suggester works with the property constraints (see Help:Property constraints portal/Entity suggestions from constraint definitions.

Should this be updated to this property? --- Jura 12:43, 27 June 2020 (UTC)