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<book-id> Book Identifier

An identifier, such as a DOI or archive control number, for a <book> or <book-part-wrapper>.

Usage/Remarks

The @book-id-type attribute should be used to name the type of identifier, such as “doi”. There is a separate element for the ISBNs (<isbn>) related to a book.
Attributes
assigning-authority
book-id-type
specific-use

Base Attributes

id
xml:base
xml:lang
Models and Context
May be contained in
<book-meta>, <event>, <event-desc>
Description
Text, numbers, or special characters
Content Model
<!ELEMENT  book-id      (#PCDATA)                                    >
Tagged Samples
DOI 
<book dtd-version="2.1">  
 <book-meta>
  <book-id book-id-type="doi" assigning-authority="crossref">
   10.1099/0193281217.001.0002</book-id>
  <book-title-group>
   <book-title>Fierce Content Models</book-title>
  </book-title-group>
  <contrib-group>...</contrib-group>
  ...
 </book-meta>
 <front-matter>...</front-matter>
 <book-body>...</book-body>
 <book-back>...</book-back>
</book>
Publisher-specific identifier 
<book dtd-version="2.1">  
 <book-meta>
  <book-id book-id-type="other">handbook</book-id>
  <book-title-group>
   <book-title>The NCBI Handbook</book-title>
  </book-title-group>
  <contrib-group>...</contrib-group>
  ...
 </book-meta>
 <front-matter>...</front-matter>
 <book-body>...</book-body>
 <book-back>...</book-back>
</book>