# Commons link constraint

> type of constraint for Wikidata properties: used to specify that the value must link to an existing Wikimedia Commons page

**Wikidata**: [Q21510852](https://www.wikidata.org/wiki/Q21510852)  
**Source**: https://4ort.xyz/entity/commons-link-constraint


## References

1. [Source](https://raw.githubusercontent.com/Pascalco/harvesttemplates/master/getconstraints.php)
2. [Source](https://raw.githubusercontent.com/wikimedia/mediawiki-extensions-WikibaseQualityConstraints/dd6d6f25d094b1f0fe2cae7a47dac2f02e842c30/extension.json)