Type of Journal Identifier


Names the type of journal identifier or the authority that created a particular journal identifier for a related journal article, since there may be several “unique identifiers” provided for a such ab article. For example, the value “doi” would indicate that the identifier is a Digital Object Identifier. The value “publisher-id” would indicate that the publisher of the article assigned this particular identifier, but would say nothing about what kind of identifier it is. Similarly, the value “pmc” would indicate that PubMed Central had provided the journal identifier.

Attribute Values

In Element

<related-article> Related Article Information
Value Meaning
Text, numbers, or special characters Word or phrase that identifies the organization or service who assigned the identifier (for example, “index” to indicate an abstracting or indexing service) or names the type of identifier (for example, “doi”). This attribute may take any value, but see the list of suggested values below.
Restriction: This attribute may be specified if the element is used.

Suggested usage

Although designed to accept any text as its value, the following are suggested journal identifier types for this attribute:


Identifier assigned by an archive or other repository


Identifier assigned by a data aggregator


Directory of Open Access Journals


Digital Object Identifier for an entire journal, not just for the article (rare)


Identifier assigned by an abstracting or indexing service


Identifier assigned by PubMed Central, for example, typically a PMC journal abbreviation such as “pnas”, “mbc”, “nar”, or “molcellb”, etc.


Identifier assigned by the content publisher, for example, “MOLEC” or “MOLCEL”


Identifier assigned by PubMed/MEDLINE, typically an abbreviated journal title such as “Mol Biol Cell”, “Nucleic Acids Res”, etc