# unique identifier

> identifier which is unique and permanent within a subset of space and time

**Wikidata**: [Q6545185](https://www.wikidata.org/wiki/Q6545185)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Unique_identifier)  
**Source**: https://4ort.xyz/entity/unique-identifier


## References

1. BabelNet
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)