Constraint report

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This special page performs constraint checks on any entity you want. The entities are fetched from the live system, so every constraint violation you fix there will be instantly removed from this list.

The constraints are parsed from statements on properties each time those statements are edited, usually within a few minutes.

Check constraints for entity

Result for language (Q34770)

: 2, : 11, : 4, : 1159, : 44

StatusPropertyMessageConstraint
reference URLThe property reference URL should not be used on this type of entity, the only valid entity type is Wikibase MediaInfo.allowed-entity-types constraint
reference URLThe property reference URL should not be used in this location (as main value). The only valid location for this property is as reference.property scope constraint
Wikidata propertyWALS lect code should also have the inverse statement Wikidata item of this property language.inverse constraint
equivalent classThis property's value should not be present on any other item, but is also present on language.distinct-values constraint
NALT IDThis property's value should not be present on any other item, but is also present on language.distinct-values constraint
said to be the same asparole should also have the symmetric statement said to be the same as language.symmetric constraint
Yahoo Answers category IDThis property's value should not be present on any other item, but is also present on language.distinct-values constraint
category for eponymous categoriesValues of category for eponymous categories statements should be instances or subclasses of Wikimedia meta category (or of a subclass of it), but Category:Wikipedia categories named after languages currently isn't.value-type constraint
WordNet 3.1 Synset IDThis property's value should not be present on any other item, but is also present on language.distinct-values constraint
topic's main categoryCategory:Languages sorted alphabetically should also have the inverse statement category's main topic language.inverse constraint
topic's main categoryThis property should contain a single “best” value with the same applies to part qualifier. Of the current multiple values, one should be marked with “preferred” rank.single-best-value constraint
topic's main categoryThis property's value should not be present on any other item, but is also present on human language.distinct-values constraint
topic's main categoryThis property should contain a single “best” value with the same applies to part qualifier. Of the current multiple values, one should be marked with “preferred” rank.single-best-value constraint
topic's main templateThis property should only have a single value with the same set of qualifiers for these properties: single-value constraint
topic's main templateThis property should only have a single value with the same set of qualifiers for these properties: single-value constraint
topic's main templateThis property should only have a single value with the same set of qualifiers for these properties: single-value constraint
Google Knowledge Graph IDAn entity should not have statements for both Google Knowledge Graph ID and Freebase ID.conflicts-with constraint