v t e Documentation science

Has list	Persons (person) Places (human settlement) Artworks (work)

Classification scheme	list of Wikidata properties (related category) list of Wikidata identifiers (related category) ...

value-requires-statement constraint (Q21510864): type of constraint for Wikidata properties: used to specify that the referenced item should have a statement with a given property → property → instance of
value-type constraint (Q21510865): type of constraint for Wikidata properties: used to specify that the value item should be a subclass or instance of a given type → class → geographic region
subject type constraint (Q21503250): type of constraint for Wikidata properties: used to specify that the item described by such properties should be a subclass or instance of a given type
→ class → artificial physical object • automobile model • ship class • group of works • tram • food • product model
conflicts-with constraint (Q21502838): type of constraint for Wikidata properties: used to specify that an item must not have a given statement → item of property constraint → Wikimedia template
contemporary constraint (Q25796498): type of constraint for Wikidata properties: used to specify that the subject and the object have to coincide or coexist at some point of history

location of creation (P1071): place where the item was conceived or made; where applicable, location of final assembly

Liberty Leading the People (Q29530): painting by Eugène Delacroix, Louvre

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