| Name | Metaprefix | URI |
|---|---|---|
| Orphanet Rare Disease Ontology | orphanet.ordo |
http://www.orpha.net/ORDO/Orphanet_C023 |
| Bioregistry | bioregistry |
https://bioregistry.io/orphanet.ordo:C023 |
| Identifiers.org | miriam |
https://identifiers.org/orphanet.ordo:Orphanet_C023 |
| Name-to-Thing | n2t |
https://n2t.net/orphanet.ordo:C023 |