Type of publication identifier or the organization or system that defined the identifier.
This attribute is used in several 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: | |
Best Practice: The type of identifier should be named for established types (DOIs, SICIs, Codens). If the identifier is not of an established type, name the assigning agency (PMC, OCLC) or type of assigning agency (aggregator, archive, indexing service, publisher) which assigned the identifier. Potential values include:
aggregator | Identifier assigned by a data aggregator (generally used with elements <object-id>, <issue-id>, and <volume-id>) |
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 |
arxiv | arXiv archive of electronic preprints |
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 |
medline | NLM Medline identifier |
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. The PII is no longer in common 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 that has been 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.) |
std-designation | The official number of a standard, from a standards body such as ISO, NISO, IEEE, ASME, et al., for example, “Z39.96-2012”. |