Help:Property constraints portal/Required qualifiers
|This is the documentation page for a particular constraint type. See Help:Property constraints portal for a general overview of property constraints.|
If the property also has an allowed qualifiers constraint, all the required qualifiers must also be listed as permitted qualifiers there.
This constraint can only be checked on the main value of a statement; if any other constraint scope (P4680) is specified, an error is reported.
There are several possible ways to address a violation of this constraint:
- The most likely case is that the missing qualifier should be added. If the value is not known, it might make sense to use unknown value Help.
- It’s possible that the statement is a rare, but legitimate exception to the constraint, and nothing should be done.
This constraint has one mandatory parameter:
Example setting for population (P1082).
Example setting for solubility (P2177).
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.
Required qualifier “determination method (P459)”: this property should be used with the listed qualifier. (Help)Exceptions are possible as rare values may exist.
List of this constraint violations: Database reports/Constraint violations/P1082#mandatory qualifier, SPARQL, SPARQL (new)
Lists of properties which are set item required qualifier constraint.
- Category:Properties with required qualifiers constraints
- SPARQL query - click the execute button at the linked page to see the query result.