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) ...

v t e Wikidata qualifier • allowed qualifiers constraint

	kinship to subject (P1039): qualifier of "relative" (P1038) to indicate less usual family relationships (ancestor, son-in-law, adoptions, etc). Indicate how the qualificator item is related to the main item. start time (P580): time an entity begins to exist or a statement starts being valid end time (P582): moment when an entity ceases to exist or a statement stops being valid

required qualifier constraint (Q21510856): type of constraint for Wikidata properties: used to specify that the listed qualifier has to be used → property → kinship to subject
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 → human • fictional character • character that may or may not be fictional • ...
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 → human • fictional character • character that may or may not be fictional • ...
item-requires-statement constraint (Q21503247): type of constraint for Wikidata properties: used to specify that an item with this property should also have another given property → property → sex or gender