<booktitlealt>
The <booktitlealt> element contains the alternative title,
         subtitle, or short title for a book. It can be specialized into a
         specific element for those or other purposes.
      
      Content models
See appendix for information about this element in OASIS document type shells.
Inheritance
- topic/ph bookmap/booktitlealt
Example
<bookmap>
  <booktitle>
    <mainbooktitle>This is my big and fancy book</mainbooktitle>
    <booktitlealt>Shorter title</booktitlealt>
  </booktitle>
  <!-- ... -->
</bookmap>Attributes
The following attributes are available on this element: Universal attribute group, @outputclass, and @keyref.