<book-ref-count> Book-level Reference Count

Number of references or citations that appear in a bibliographic reference list of the book or book part.
Related Elements
Inside the <counts> container element are the counts of various components of in the book or book part: the generic count element <book-count> (for which the @count-type names what is being counted) and the specific named counting elements: <book-fig-count> is the number of figures, the <book-table-count> is the number of tables, the <book-equation-count> is the number of equations, the <book-ref-count> is either the number of references or (more properly) the number of citations in the bibliographic reference list, the <book-page-count> is the page count, and the <book-word-count> is the number of words in the book or book part.
Attributes
count (REQUIRED)

Base Attributes

Models and Context
May be contained in
Description
Text, numbers, or special characters
Content Model
<!ELEMENT  book-ref-count   
                        %book-ref-count-model;                       >
Expanded Content Model

(#PCDATA)

Tagged Samples
Empty for a simple count
...  
<book-meta>
 <book-id book-id-type="publisher">handbook-648</book-id>
 ...
 <counts>
  <book-count count-type="contributors" count="4"/>
  <book-fig-count count="98"/>
  <book-table-count count="40"/>
  <book-equation-count count="346"/>
  <book-ref-count count="115"/>
  <book-page-count count="532"/>
  <book-word-count count="149852"/>
 </counts>
</book-meta>
...
Complex content
...  
<book-meta>
 <book-id book-id-type="publisher">handbook-648</book-id>
 ...
 <counts>
  <book-count count-type="features" 
    count="46">16 maps and 30 portraits</book-count>
  <book-fig-count count="24">9 fullpage plates with 
   tissue guards and 15 large vignettes</book-fig-count>
  <book-table-count count="40">36 tables and 4 arrays</book-table-count>
  <book-equation-count count="78">70 numbered and 8 
   unnumbered</book-equation-count>
  <book-ref-count count="115">115 cited references plus 38 
   additional reading</book-ref-count>
  <book-page-count count="532">xxxii,500</book-page-count>
  <book-word-count count="349852">349,852 words not including 
   appendices</book-word-count>
 </counts>
</book-meta>
...