Sequence number of an article that starts on the same page as one or more other articles
For journals (such as continuous-makeup journals) with more than one article starting on the same page, this attribute indicates a sequence number or letter for this article. For example, the first article to start on page 62 might be given a sequence of “62a”; the sequence letter would be “a”, with a sequence letter “b” for a second article, etc.
|Text, numbers, or special characters||The number of the article in a sequence of articles on the same page. Traditionally, journals use counting letters or numbers, such as “a”, “b”, “c”; or “1”, “2”, “3”. For example, a value of “2” could mean “554-2”, page 554, second article.|
|Restriction: This attribute may be specified if the element is used.|