Help:Property constraints portal/Multi value

multi-value constraint (Q21510857) specifies that a property should have multiple value, i. e. that items should not have only one statement with this property.

This constraint type is rarely used, but some properties that usually have many values are cast member (P161), has tense (P3103) and has grammatical mood (P3161).

If no constraint scope (P4680) is specified, this constraint is checked everywhere.

Possible actions

There are several possible ways to address a violation of this constraint:

• The most likely case is that more statements for the property should be added to the item.
• It’s possible that the current item should not have the statement at all, and that the statement should be removed.
• It’s possible that the item is a rare, but legitimate exception to the constraint, and nothing should be done.

Parameters

This constraint does not have any parameters.

Example

property constraint	multi-value constraint edit 0 references add reference
		add value

Template

When the constraint is set to the property, the following template is automatically displayed in the property talk page. The template is created by Module:Constraints using Template:Constraint, invoked from Template:Property documentation. Translations are defined at Module:i18n/constraints.

Multi value: this property generally contains two or more values. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P1990#Multi value, SPARQL

Lists

Lists of properties which are set multi-value constraint.

• Category:Properties with multi value constraints
• SPARQL query - click the execute button at the linked page to see the query result.