Top-level element for the NCBI Book DTD. A “book” as defined in this DTD covers a variety of STM monographs and reference books, largely biomedical in subject, that may include previously published works, historical works, new works written for NCBI, compilations, and internal regulations and procedures of NLM.


book-id Book Identifier
dtd-version Version of the DTD
xml:lang Language
xmlns:mml MathML Namespace Declaration
xmlns:xlink XLink Namespace Declaration
xmlns:xsi XML Schema Namespace Declaration

Related Elements

A book <book> may be divided into four parts:

  1. the <book-meta> (the book metadata or header information);
  2. the <book-front> (textual material that precedes the actual contents of a book, for example, author biographical information or a preface);
  3. the <body> (textual and graphical content of the book); and
  4. any <back> (ancillary information such as a glossary, reference list, or appendix).

Model Information

Content Model

<!ELEMENT book          %book-model;                                 >


The following, in order:

This top-level element may not be contained in any other elements.

Tagged Example

<book dtd-version="2.2" xmlns:xlink="http://www.w3.org/1999/xlink"