Names the type of identifier, or the organization or system that defined the identifier, for a journal article identifier (part of the article metadata) or for a publication cited in a bibliographic reference list.
Used on the <article-id> element, which holds an identifier for the entire article. Also used on the <pub-id> element, which is an identifier for a publication cited in a bibliographic reference <citation>.
|coden||Obsolete PDB/CCDC identifier, which may be present on older articles.|
|doi||Digital Object Identifier.|
|medline||NLM MEDLINE identifier.|
|pii||Publisher Item Identifier; see /epub/piius.htm|
|pmid||PubMed ID; see www.ncbi.nlm.nih.gov/entrez/ query.fcgi?db=PubMed|
|publisher-id||Identifier (ID) such as an “article-id”, “artnum”, “identifier”, “article-number”, etc. that is given to an article by the publisher of the article. This could be the publisher’s unique internal production number or a more general identifier.|
|sici||Serial Item and Contribution Identifier. (A journal article may have more than one SICI, i.e., one for a print version and another for an electronic version.)|
|other||Something other than one of the identifiers named in the list just given.|
|Restriction: This attribute may be specified if the element is used.|