NIFEXT covers IRIs that were "external" identifiers that were brought into the ontology at some point in time. This was done before most of the current standard ontology and identifier management practices had been developed.
Local identifiers in NIF Standard Ontology: External should match this
Compact URIs (CURIEs) constructed from NIF Standard Ontology: External should match
this regular expression:
Providers are various services that resolve CURIEs to URLs. The example CURIE
is used to demonstrate the provides available for
nif.ext. Generation of OLS and BioPortal URLs requires additional programmatic
logic beyond string formatting.
|NIF Standard Ontology: External||