Records the total number of either a) the references (<ref>) or (more properly) b) the number of citations (<mixed-citation>) that appear in the bibliographic reference list (<ref-list>) for a book. This count is (roughly) the number of sources cited in the book.
The count elements are modeled as EMPTY elements that have no content but carry values on their attributes.
<!ELEMENT ref-count EMPTY >
This is an EMPTY element
<book>
<book-meta>
<book-id pub-id-type="other">handbook</book-id>
<book-title-group>
<book-title>The NCBI Handbook</book-title>
</book-title-group>...
<counts>
<fig-count count="98"/>
<table-count count="40"/>
<equation-count count="0"/>
<ref-count count="115"/>
<page-count count="532"/>
<word-count count="149852"/>
</counts>
</book-meta>
<book-front>...</book-front>
<body>...</body>
<back>...</back>
</book>
articlemeta3.ent