Type of publication identifier or the organization or system that defined the identifier.
This attribute is used in several contexts:
Inside a bibliographic citation element (such as <mixed-citation> or <element-citation>), for example, on the <pub-id> element, which identifies a publication cited in a bibliographic reference list;
On an object identifier element (<object-id>), which can act as an identifier for any number of different elements.
| Value | Meaning |
|---|---|
| accession | (Bioinformatics) a unique identifier given to a DNA or protein sequence record for tracking the sequence record and the associated sequence over time in a data repository. |
| ark | Archival Resource Key — a Uniform Resource Locator (URL) containing the word
arkthat is a multi-purpose identifier for information objects of any type |
| 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. |
| handle | Handle identifier, part of the Handle System for assigning, managing, and resolving persistent identifiers for digital objects and other resources on the Internet |
| isbn | International Standard Book Number. |
| manuscript | Identifier assigned to a manuscript. |
| medline | NLM Medline identifier. |
| other | None of the named identifiers in this list. |
| pii | The original Publisher Item Identifier(PII) was a system to provide unique and concise identification for individual published documents with a highly specified string. The PII specification is no longer in common use (2010). |
| pmcid | PubMed Central identifier. |
| pmid | PubMed ID; see https://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 older ANSI/NISO Z39.56 code to uniquely identify volumes, journal 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, and others, for example, Z39.96-2015. |
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The type of identifier of the cited objects, which may be a standard, book, journal
article, etc. This attribute is typically used to name the type of identifier (such
as doi) or the name of the organization or type of organization that created the identifier ( ISOor archive). |
| Value | Meaning |
|---|---|
| Text, numbers, or special characters | The type of identifier assigned to an internal structure such as a figure or boxed
text (typically, a doi, but the attribute may name the organization that created the identifier, CEN, or the type of organization that created the identifier, reseller). |