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.
For certain compilation books in which more than one book part can begin on a single page, this attribute can record a sequence number or letter to differentiate one book part from the other book parts on the same page. For example, the first book part 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 book part.
OPTIONAL on many elements; click for list and usage
<book-app>, <book-app-group>, <book-part>, <collection-meta>, <dedication>, <elocation-id>, <foreword>, <fpage>, <front-matter-part>, <issue>, <preface>, <volume>
|Text, numbers, or special characters||The number of the document in a sequence of documents within a volume, issue, electronic compilation, or even on the same page. For example, for continuous-makeup journals or compilation books that start more than one article or book component on the same page, this attribute indicates a sequence number or letter for one of the book parts, such as “a”, “b”, “c”; or “1”, “2”, “3”. For example, a value of “2” could mean “554-2”, page 554, second book part.|
|Restriction||@seq is an optional attribute; there is no default.|
Within the metadata for a Book Part
... <book-part-meta> ... <fpage seq="1">1</fpage> <lpage>44</lpage> <supplementary-material mime-subtype="zip" mimetype="application" xlink:href="ASASTD.ANSI.ASA.S3.50.supplementary-material.zip"/> </book-part-meta> ...