Compact Identifiers (CURIEs)
Examples PDB:2gc4 Taxon:9606 DOI:10.5281/ZENODO.1289856 ark:/47881/m6g15z54 IGSN:SSH000SUA General format Prefix:LocalId Registry links -> full set of N2T prefix records -> joint N2T/Identifiers.org prefix list -> request to add a prefix to the list Early adoption -> Nature Scientic Data: On the road to robust data citation Formal support -> Memorandum of Understanding Between CDL and EMBL-EBI
How they work
N2T.net is a kind of URL shortener for persistent identifiers. The above compact identifiers, also known as CURIEs (Compact URIs). They become actionable when appended to a URL based at N2T.net:
https://n2t.net/PDB:2gc4 https://n2t.net/Taxon:9606 https://n2t.net/DOI:10.5281/ZENODO.1289856 https://n2t.net/ark:/47881/m6g15z54 https://n2t.net/IGSN:SSH000SUA
Besides storing and resolving individual identifiers, N2T.net also stores resolution rules for entire classes, based on the prefixes. Failing to find a match after looking up an individual identifier, N2T looks for a rule associated with the identifier's prefix. Rules for the above identifiers result in the following redirects, respectively:
> http://www.rcsb.org/pdb/explore/explore.do?structureId=2gc4 > http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&id=9606 > https://zenodo.org/record/1289856 > http://bibnum.univ-lyon1.fr/nuxeo/nxfile/default/49e1576c-0cae-4b4b-a63b-73370f476681/blobholder:0/THm_2014_NGUYEN_Marie_France.pdf > https://app.geosamples.org/sample/igsn/SSH000SUA
There is a formal agreement between Identifiers.org and N2T.net to serve a common set of prefixes. You can read more about this effort and our plans to reach out to publishers to encourage adoption of inline citation of compact identifiers in Uniform Resolution of Compact Identifiers for Biomedical Data.