Anyone know/recommend any API schemas/standards for REST APIs that allow machines to discover their resources?

For example I see OpenApi v3 mentioned here (which uses a yaml file to give context) and I am also familiar with NGSIv2[1] which will get standardized by ETSI supposedly (NGSI-LD[2]). NGSI seems to embed info in the json so that your application can know if this float is Celsius or Fahrenheit.

Any other open options?

[1]: https://fiware.github.io/specifications/ngsiv2/stable/ [2]: https://fiware-datamodels.readthedocs.io/en/latest/ngsi-ld_f...