The Caption containing the printed caption for the . Content model allows multiple if they share a caption, multiple if several captions refer to a single , and multiple if different versions are needed for different media. If the caption applies to more than one , each idref in the list of IDs in the imgref is separated by whitespace. It is used to quickly identify the book. Corresponds to through used in through .
Any definition can contain another definition list.
Used when a list item is made up of two or more components, as in a table of contents entry. This information is consonant with the head information in xhtml. Use within for the actual book title, which will usually be the same.