%pub-date.class;

Publication Date Class Elements

The element <pub-date> and a <date-not-available> element. The later is used as an alternative to <pub-date>; it is an empty element flag meaning “we do not know the publication date”, which does not mean “unpublished”, necessarily, just unknown.

Model

<!ENTITY % pub-date.class
                        "date-not-available | pub-date"              >