seq

Sequence Number

Sequence number of a document within the type of sequence named by the element to which this attribute is attached: on a <volume> element, the sequence within the volume; on an <issue> element, the sequence within the issue; on an <fpage> element, the sequence within a single page; and on an <elocation-id> element, the electronic sequence.

Used on these Elements:

ValueMeaning
Text, numbers, or special charactersThe number of the document in a sequence of documents within a volume, issue, electronic compilation, or even on the same page.
RestrictionThis attribute is an optional attribute; there is no default.