<pub-date-not-available> Publication Date Not Available Flag

An empty element which signals that the publication date (<pub-date>) is not available. This does not mean the article is unpublished, merely that the publication date cannot be supplied.

Base Attributes

Models and Context
May be contained in
This is an EMPTY element
Content Model
<!ELEMENT  pub-date-not-available
                        %pub-date-not-available-model;               >
Expanded Content Model


Tagged Sample

Publication date unknown

 <article-id pub-id-type="pmid">...</article-id>