Subordinate heading or title for a book or for one of its structural elements, such as a <book-part>
Conversion Note: Within a bibliographic reference citation, a subtitle cannot be preserved separately. Some DTDs place it within the title; some leave it as untagged data characters within the text of the <citation>. Although this DTD Suite cannot enforce either structure, retrieval performance will be enhanced if the subtitle is placed into the <article-title> element in cited material, so this is considered best practice.
<!ELEMENT subtitle (#PCDATA %title-elements;)* >
Any combination of:
... <book-meta> <book-id>...</book-id> <book-title-group> <book-title>Sequence - Evolution - Function</book-title> <subtitle>Computational Approaches in Comparative Genomics</subtitle> </book-title-group> ... <publisher> <publisher-name>Kluwer Academic Publishers</publisher-name> <publisher-loc>Norwell, MA</publisher-loc></publisher> <permissions> <copyright-statement>© 2003 by Kluwer Academic Publishers.</copyright-statement> <copyright-year>2003</copyright-year> </permissions> <abstract>...</abstract> </book-meta> ...