Type of Alternate Title

Reason for or purpose of an alternate title (for example, “toc” for a title used in a table of contents, “rt-running” for a right-running-head title for print).

Attribute Values

In Element

Text, numbers, or special charactersA word or phrase describing the rationale for this version of the title, for example, “right-running-head”.
Restriction: This is an optional attribute; there is no default.