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book-part-type Type of Book Part

Type of narrative material, for example, a book part (such as a chapter, dedication, preface, etc.).
OPTIONAL on many elements; click for list and usage

<book-app>, <book-app-group>, <book-part>, <dedication>, <foreword>, <front-matter-part>, <preface>

Value Meaning
Text, numbers, or special characters The type of narrative material, for example, “foreword”.
Restriction @book-part-type is an optional attribute; there is no default.
Tagged Sample

Identifying a book segment as a chapter

<book-body>
 <book-part book-part-type="chapter">
  <book-part-meta>...</book-part-meta>
 ...
 </book-part>
</book-body>