An article ID is the unique identifier assigned to each manuscript. The <article-id> element is usually found in <article-meta>.
There can be multiple article IDs tagged for the same manuscript, as there are different identifiers that may be used in each tag, such as a DOI, an article ID (CATS manuscript ID), a PubMed ID, or an archive identifier, but only one identifier should be tagged per <article-id> element. The identifiers may contain text, numbers, and special characters. When using multiple <article-id> elements, it is required to use the @pub-id-type attribute to indicate the type of identifier. Depending on the type of identifier, the @assigning-authority attribute may be used to indicate the organization or system that assigned the identifier.
The article ID should be tagged in an <article-id> element with the @pub-id-type attribute value publisher-id. The primary DOI should be tagged in an <article-id> element with @pub-id-type attribute value doi. For articles in production, the article ID and the DOI will be provided in the CATS article metadata.
Each article will have at least one DOI. Additional DOIs may be tagged with the @pub-id-type attribute value doi-alias when the additional DOI is registered with CrossRef as an alias to the primary DOI. The @pub-id-type attribute value doi-alternative should be used when the additional DOI points to a version of the article hosted by a different organization.
The identifier that is assigned to an article at the point of submission, and subsequently used during peer review, may be tagged using @pub-id-type attribute value submission-id. The submission-id appears in CATS as the secondary manuscript ID.
An example of three different types of article identifiers:
<article-id pub-id-type="doi">10.1080/13696998.2019.1609300</article-id>
<article-id pub-id-type="publisher-id">1609300</article-id>
<article-id pub-id-type="submission-id">JME-2018-0236-RT.R1</article-id>