Some properties are supposed to be used only on one or a few entity types. As an editor I want to be able to define which entity types a property can be used on so I can easily find cases where the property is used in a wrong context via the existing constraint system.
Violation message shown to the user on violating statements: "Entity type constraint: This property should only be used on "$entitytype"."
Constraint statement on the property: "property constraint" -> "entity type constraint" with qualifier "item of property constraint" -> "Wikibase item"/"Wikibase property"/…
Examples where this is likely to be used:
- indicating that "property constraint" should only be used on properties
- restricting "rhymes with" and similar properties to Lexemes