Type of Alternate Title
Reason for or purpose of an alternate title (for example, “toc” for a title used in a Table of Contents, “right-running” for a right-running-head title for print).
Used on Element: <alt-title>
|Text, numbers, or special characters||A 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.|