Help:Property constraints portal/Value

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used for values only constraint (Q21528958) specifies that a property should only be used for the main value of a statement, not in a reference or as qualifier.

This constraint applies to most properties, e. g. head of government (P6), father (P22), mother (P25), Freebase ID (P646), etc.

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

Possible actions[edit]

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

  • It’s possible that the qualifier or reference should use a different property.
  • It’s possible that the qualifier or reference is incorrect and should be removed.
  • It’s possible that the item is a rare, but legitimate exception to the constraint, and nothing should be done.


This constraint does not have any parameters.