Describes the type of external link — for example, the specific source to which the link points (“pdb”, “pir”), the identifier type (“doi”,“aoi”), or the access method (“ftp”, “uri”)
Value | Meaning |
---|---|
Text, numbers, or special characters | The type of link, for example, “ftp” or “uri”. This attribute may take any value, but see the list of suggested values below. |
Restriction: This attribute may be specified if the element is used. |
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/ |
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.tarweed.com/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 |