What kind of external link, for example, a pointer to an external database. Types of links include the identifier type, such as “doi” for a Digital Object Identifier; the access method, such as “ftp” for an ftp site; or the specific external source to which the link points, such as the protein data bank “pdb”.
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. |
This list is slightly overloaded in that two different functions are being performed. The first is to name the specific external source when it is one of the ones named below. If the external source is not one of the ones below, the type of link (DOI, AOI) or type of access (ftp, URI, etc.) should be named instead. The idea is to be as specific as possible, i.e., if you are pointing to the Protein data bank, use “pdb” but if you are pointing to another protein registry though its URL, use “uri”.
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 |
medline |
MEDLINE or PubMed identifier |
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 |
pmc |
Linkage between articles in PubMed Central (Access is PMID.) |
sprot |
Swiss-Prot; see http://www.ebi.ac.uk/swissprot/ |
uri |
Website or web service |