Publication dates
Capture publication date of an article in the pub-date element.
article-meta/pub-date
Use a pub-type attribute to identify the publication event the date represents. The following table explains the allowed values (see also Cover dates).
| pub-type value | Description | Example |
|---|---|---|
epub |
To capture the date the article was first published online |
<pub-date pub-type="epub" iso-8601-date="2015-09-01"> <day>01</day> <month>09</month> <year>2015</year> </pub-date> |
collection |
To capture the online publication date of an issue |
<pub-date pub-type="collection" iso-8601-date="2015-09-01"> <day>01</day> <month>09</month> <year>2015</year> </pub-date> |
All articles must have an epub
date.
Once published in an issue all articles must also have a collection
date.
The collection
date captured here must match exactly the date found in the issue_meta
file. See Issue meta: Publication dates for more details.
For Continuous Publication issues, the collection
date is the date the first
article was published in the issue.
The collection
date must be consistent across all articles within an
issue.
Seasons are not to be captured as a publication date. For those, see Cover Dates.
Within the pub-date element for an epub
or collection
date, capture a day,
month, and year element.
The month value must be an integer between 01 and 12 inclusive. The day value must be an integer between 01-31 inclusive.
On the pub-date element for an epub
or collection
date, capture a iso-8601-date attribute whose value is an
ISO 8601 date (YYYY-MM-DD
) corresponding to the values of the
year, month, and day
elements.
Embargoed article
If an article is embargoed from publication until a specific time, capture the time
as part of the iso-8601-date attribute. The time is given in UTC
format. The iso-8601-date attribute will have the format
YYYY-MM-DDThh:mm:ssZ
.
In this example, the article is embargoed until midnight UTC on 2 September 2020.
<pub-date pub-type="epub" iso-8601-date="2020-09-02T00:00:00Z"> <day>02</day> <month>09</month> <year>2020</year> </pub-date>