8.5.76 @pub-id-type Type of Publication Identifier

Names the type of publication identifier, or the organization or system that defined the identifier.

This attribute is used in two contexts:

Inside a bibliographic citation (for example, on the <pub-id> element, which identifies a publication cited in a bibliographic reference list), and
On an object identifier (for example, on the <object-id> element, which can act as an identifier for any number of different elements).

In element <pub-id>, this attribute may be used if the element is used.

Value	Meaning
art-access-id	Generic article accession identifier for interchange and retrieval between archives
coden	Obsolete PDB/CCDC identifier (may be present on older articles)
doaj	Directory of Open Access Journals
doi	Digital Object Identifier
isbn	International Standard Book Number
manuscript	Identifier assigned to a manuscript
other	None of the named identifiers
pii	Publisher Item Identifier; see http://web.archive.org/web/20031013073003/http://www.elsevier.nl/inca/homepage/about/pii/
pmcid	PubMed Central identifier
pmid	PubMed ID; see http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed
publisher-id	Publisher’s identifier, such as an article-id, artnum, identifier, article-number, pub-id, etc.
sici	Serial Item and Contribution Identifier (An ANSI/NISO Z39.56 code to uniquely identify volumes, articles, or other parts of a periodical. A journal article may have more than one SICI, for example, one for a print version and another for an electronic version.)

In elements <issue-id>, <object-id>, and <volume-id>, this attribute may be used if the element is used.

Value	Meaning
Text, numbers, or special characters	The type of identifier doior name or type of organization that created the identifier pmcid (PubMed Central identifier)