# subject type constraint

> type of constraint for Wikidata properties: used to specify that the item described by such properties should be a subclass or instance of a given type

**Wikidata**: [Q21503250](https://www.wikidata.org/wiki/Q21503250)  
**Source**: https://4ort.xyz/entity/subject-type-constraint


## References

1. [Source](https://raw.githubusercontent.com/wikimedia/mediawiki-extensions-WikibaseQualityConstraints/dd6d6f25d094b1f0fe2cae7a47dac2f02e842c30/extension.json)