Number of <disp-formula> elements that appear in a book (or book component)
The count elements are modeled as EMPTY elements that have no content but carry values on their attributes.
<!ELEMENT equation-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