Property talk:P1647

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subproperty of
all resources related by this property are also related by that property

Description	all resources related by this property are also related that property. Implements rdfs:subPropertyOf.
Data type	Property
Domain	According to this template: Wikidata property (Q18616576) - Wikidata:Glossary#Property According to statements in the property: Wikidata property (Q18616576) When possible, data should only be stored as statements
Allowed values	Other Wikidata property (Q18616576) - Wikidata:Glossary#Property (note: this should be moved to the property statements)
Example	According to this template: member of (P463) subproperty of part of (P361) (member of is the non-transitive subproperty of part of) official name (P1448), pseudonym (P742), short name (P1813), name in native language (P1559), birth name (P1477) subproperties of Name Note: it is not valid to declare subproperties of instance of (P31) (rdf:type), subclass of (P279) (rdfs:subClassOf) or any other property mapped to a built-in property of RDF, RDFS or OWL. See creation discussion. According to statements in the property: parent taxon (P171) → subclass of (P279) country of citizenship (P27) → country (P17) When possible, data should only be stored as statements
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/P1647 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 809 Main statement 806 99.6% of uses Qualifier 2 0.2% of uses Reference 1 0.1% 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)”: element must contain property “instance of (P31)” with classes “Wikidata property (Q18616576)” or their subclasses (defined using subclass of (P279)). (Help) List of this constraint violations: Database reports/Constraint violations/P1647#type, hourly updated report, SPARQL

Value type “Wikidata property (Q18616576)”: 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 property (Q18616576) (or a subclass thereof). (Help) List of this constraint violations: Database reports/Constraint violations/P1647#Value type, hourly updated report, SPARQL

Property “Wikidata item of this property (P1629)” declared by target items of “subproperty of (P1647)”: If [item A] has this property with value [item B], [item B] is required to have property “Wikidata item of this property (P1629)”. (Help) Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P1647#Target required claim, SPARQL, SPARQL (by value)

Property “Wikidata property example (P1855)” declared by target items of “subproperty of (P1647)”: If [item A] has this property with value [item B], [item B] is required to have property “Wikidata property example (P1855)”. (Help) Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P1647#Target required claim, SPARQL, SPARQL (by value)

Conflicts with “subclass of (P279)”: this property must not be used with the listed properties and values. (Help) List of this constraint violations: Database reports/Constraint violations/P1647#Conflicts with, hourly updated report, search, SPARQL

Scope is as main value (Q54828448): the property must be used by specified way only (Help) List of this constraint violations: Database reports/Constraint violations/P1647#scope, 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 this constraint violations: Database reports/Constraint violations/P1647#allowed entity types, hourly updated report

Item “property constraint (P2302)”: Items with this property should also have “property constraint (P2302)”. (Help) Exceptions are possible as rare values may exist. List of this constraint violations: Database reports/Constraint violations/P1647#Item, search, SPARQL

What is the reason for the P1629 constraint?

I don't understand this constraint:

Property "Wikidata item of this property (P1629)" declared by target items of “subproperty of (P1647)”: If [item A] has this property with value [item B], [item B] is required to have property “Wikidata item of this property (P1629)”.

That is, I understand what it does (I believe), but I don't understand the reason. NisJørgensen (talk) 14:03, 25 July 2019 (UTC)

incorrect claim in core of Wikidata ontology

I see the claim here that subproperty of (P1647) subproperty of (P1647) subclass of (P279).

Surely this is incorrect. But the real question is how such a core incorrect claim can have persisted since September 2019 without anyone noticing. Is there any way to protect the core items of the Wikidata ontology from bad changes? Is there nothing in Wikidata that would flag material changes to the core items of the Wikidata ontology?