A “reverse lookup” finds a prefix for a given namespace URI. You can perform reverse lookups by entering a namespace URI into the box on the start page, or by using the reverse lookup API.
Query URL:
https://prefix.cc/reverse
GET query parameters:
uri – URLencoded namespace URI
format – any of the supported formats (optional)
Examples:
https://prefix.cc/reverse?uri=http://xmlns.com/foaf/0.1/
https://prefix.cc/reverse?uri=http://xmlns.com/foaf/0.1/name
https://prefix.cc/reverse?uri=http://xmlns.com/foaf/0.1/&format=ttl
https://prefix.cc/reverse?uri=http%3A%2F%2Frdfs.org%2Fsioc%2Fns%23site
“Bulk lookup” of many URIs in a single request is not supported by the URIs. Please download the entire namespace data and perform bulk operations locally.