Names the type of publication identifier, or the organization or system that defined the identifier.
This attribute is used in three contexts:
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The type of identifier “ doi ” or name or type of organization that created the identifier, such as “ aggregator ” |
| Restriction: This attribute may be specified if the element is used. | |
Best Practice: Use the value for the type of identifier for established types (such as DOIs, SICIs, and ISBNs). If the identifier is not of an established type, name the assigning agency (PMC) or type of assigning agency (such as aggregator or publisher) which assigned the identifier. Potential values include:
|
archive |
Identifier assigned by an archive or other repository (generally used with elements <object-id>, <issue-id>, and <volume-id>) |
|
art-access-id |
Generic article accession identifier for interchange and retrieval between archives |
|
aggregator |
Identifier assigned by a data aggregator (generally used with elements <object-id>, <issue-id>, and <volume-id>) |
|
coden |
Obsolete PDB/CCDC identifier (may be present on older articles) |
|
doaj |
Directory of Open Access Journals |
|
doi |
Digital Object Identifier |
|
index |
Identifier assigned by an abstracting or indexing service (generally used with elements <object-id>, <issue-id>, and <volume-id>) |
|
isbn |
International Standard Book Number |
|
manuscript |
Identifier assigned to a manuscript |
|
pii |
The original “Publisher Item Identifier” (PII) was a plan to provide unique and concise identification of individual published documents with a highly specified string. See 2004 archived description at: http://web.archive.org/web/20040313003425/http://www.aip.org/epub/piipr.html. This PII is apparently no longer in inter-company use (2010). A more generic “pii” defined as “publisher’s internal identifier” is used by some archives, for example, PubMed Central, to mark “any internal reference identifier used in the publishing process [that is] assigned by the publisher”. |
|
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.) |