Property talk:P8989

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category for the view of the item
category for the view of this item (object, place)

Has quality	complex constraint value label (Q100884525)
Data type	Item
Example	Cassano Magnago (Q40202) → Category:View of Cassano Magnago (Q104214112) Lillafüred (Q1042839) → Category:View of Lillafüred (Q104214092)
Tracking: usage	Category:Pages using Wikidata property P8989 (Q118210247)
See also	category for the view from the item (P8933)
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 By value of property Most statements Fewest statements Most sitelinks Most linked wikis Most identifiers 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/Complex constraint violations/P8989 Database reports/Constraint violations/P8989 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 8,412 Main statement 8,410 >99.9% of uses Qualifier 2 <0.1% of uses
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Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (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/P8989#Entity types

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/P8989#Scope, SPARQL

Value type “Wikimedia category (Q4167836)”: 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 Wikimedia category (Q4167836) (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/P8989#Value type Q4167836, SPARQL

Conflicts with “instance of (P31): Wikimedia category (Q4167836)”: this property must not be used with the listed properties and values. (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/P8989#Conflicts with P31, search, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (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/P8989#Unique value, SPARQL (every item), SPARQL (by value)

Single value: this property generally contains a single value. (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/P8989#Single value, SPARQL

value label (1: should match regex)
fix label or adjust regex for language at Property:P8989#P1552: complex constraint value label (Q100884525) (Help)
Violations query: SELECT ?item ?lang ?l ?value ?v ?t WHERE { hint:Query hint:optimizer "None". wd:P8989 p:P1552 [ ps:P1552 wd:Q100884525 ; pq:P8770 ?t ] BIND( lang(?t) as ?lang) ?item wdt:P8989 ?value. OPTIONAL { ?item rdfs:label ?l . FILTER(lang(?l) = ?lang) } ?value rdfs:label ?v . FILTER(lang(?v) = ?lang) FILTER ( !REGEX(str(?v), str(?t) ) ) } # ORDER BY ?lang ?v
List of this constraint violations: Database reports/Complex constraint violations/P8989#value label (1: should match regex)

value label (1: languages lacking a regex)
determine a regex and add it at Property:P8989#P1552: complex constraint value label (Q100884525) (Help)
Violations query: SELECT ?item ?lang (COUNT(*) as ?count) (SAMPLE(?l) as ?sample_l) (SAMPLE(?s) as ?sample_s) (SAMPLE(?value) as ?sample_value) WHERE { hint:Query hint:optimizer "None". ?s wdt:P8989 ?value . ?value rdfs:label ?l . BIND(lang(?l) as ?lang) OPTIONAL { wd:P8989 p:P1552 [ ps:P1552 wd:Q100884525 ; pq:P8770 ?t ] FILTER( lang(?t) = ?lang) } FILTER( !BOUND(?t) ) ?item wdt:P424 ?lang ; wdt:P305 [] . } GROUP BY ?item ?lang HAVING ( ?count > 9) ORDER BY DESC ( ?count)
List of this constraint violations: Database reports/Complex constraint violations/P8989#value label (1: languages lacking a regex)