None, "Already defined: " ^ UriManager.string_of_uri s
| CoercDb.EqCarrNotImplemented msg ->
None, ("EqCarrNotImplemented: " ^ Lazy.force msg)
None, "Already defined: " ^ UriManager.string_of_uri s
| CoercDb.EqCarrNotImplemented msg ->
None, ("EqCarrNotImplemented: " ^ Lazy.force msg)