Issue Cover Date

Capture the issue cover date date for an article in a <pub-date> element containing a @pub-type attribute with value ppub.

The <pub-date> element must have a @iso-8601-date attribute containing a ISO-8601 formatted date (See https://www.iso.org/iso-8601-date-and-time-format.html)

The <pub-date> must have <day> , <month> and <year> child elements populated with the correct numerical values.

The date values must include leading zeros.

Example

<pub-date pub-type="ppub" iso-8601-date="2023-06-01">
  <day>01</day>
  <month>06</month>
  <year>2023</year>
</pub-date>