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<pub-date> Publication Date
In ISO STS, this element holds the date on which a standard is (or was) first published.
For this NISO STS Tag Set, this publishing date should be recorded using the <release-date> element.
Usage/Remarks
Pub Date Deprecated
For new documents, tagging the published date as <release-date> is considered Best Practice. The element <pub-date> should not be used as part of a standards document’s metadata.
The <pub-date> element has been retained in the ISO-related metadata elements (<iso-meta>, <reg-meta>, <nat-meta>) for purposes of backwards compatibility. This element has been placed into the models
for <std-meta> and <std-doc-meta> for purposes of ISO and ISO-related organization’s future migration.
Here is a tagged example from ISO STS of the previous use of the element <pub-date>:
<iso-meta> ... <pub-date>2009-05-30</pub-date> <release-date>2009-05-30</release-date> ... </iso-meta>
Here is a NISO STS tagged example showing the <release-date> element replacing <pub-date> for initial publication and description of the current standards document:
<iso-meta>
...
<release-date
date-type="published"
std-type="new-standard"
iso-8601-date="2009-05-30">2009-05-30</release-date>
<release-date
date-type="published"
std-type="IS"
iso-8601-date="2009-05-30">2009-05-30</release-date>
...
</iso-meta>If Publication Date is Not Available
The <pub-date> is an optional element, so if the publication date is not available, the element
can just be omitted. The preferred replacement element <release-date> is also optional, so if the publication date is not available, both of these elements
can just be omitted. However, if the <pub-date> is unknown (for whatever reason) the word “unknown” is allowed to be used as the element content:
<pub-date>unknown</pub-date>
Attributes
Models and Context
May be contained in
Description
Text, numbers, or special characters
Content Model
<!ELEMENT pub-date %pub-date-model; >
Expanded Content Model
(#PCDATA)