Type of external link; may include a specific source (for example, “pdb”, “pir”), identifier type (for example, “doi”), or access method (for example, “ftp”, “uri”).
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The type of link, for example, “ftp” or “uri”. |
| Restriction: | |
If the external source is not in the list below, the type of link (DOI, AOI) or type of access (ftp, URI) should be named.
aoi | Astronomical object identifier |
doi | Digital object identifier |
ec | Enzyme nomenclature; see http://www.chem.qmw.ac.uk/iubmb/enzyme/ |
Email address | |
ftp | File transfer protocol |
gen | GenBank identifier |
genpept | Translated protein-encoding sequence database |
highwire | HighWire press intrajournal |
nlm-ta | NLM title abbreviation |
pdb | Protein data bank; see http://www.rcsb.org/pdb/ |
pgr | Plant gene register; see http://www.ebi.ac.uk/~textman/pgr-htdocs/pgr/b |
pir | Protein information resource; see http://pir.georgetown.edu |
pirdb | Protein information resource; see http://pir.georgetown.edu |
pmcid | PubMed Central identifier |
pmid | PubMed identifier |
sprot | Swiss-Prot.; see http://www.ebi.ac.uk/swissprot/ |
uri | Website or web service |