Size of a resource or object described in a bibliographic reference or product. The @units attribute must be used to name the unit of measure (for example, minutes, hours, linear feet, pages).
Text, numbers, or special characters, zero or more
<element-citation>, <mixed-citation>, <related-article>, <related-object>
...
<ref>
<element-citation publication-type="commun">
<person-group>
<name><surname>Nightingale</surname>
<given-names>Florence</given-names></name>
</person-group>
<comment>115 Park Street, W, [London, GB]</comment>
<source>Letter to: Marquis Townshend</source>
<year>1864</year>
<month>Jul</month>
<day>27</day>
<size units="leaf">4 leaves</size>
<comment>Located at: Modern Manuscripts Collection,
History of Medicine Division, National Library of
Medicine, Bethesda, MD; MS F 179</comment>
<annotation><p>Nightingale responds to Townshend’s
request on behalf of a Mrs. Montague for funds to
support old nurses</p></annotation>
</element-citation>
</ref>
...
...
<p>The toll of AIDS in Africa far exceeds its proportion
of the world population. Only 12% of the world's population
inhabit Africa, but the continent has over 60% of the
AIDS-infected population. Mortality statistics are complicated
by the relationship between Tuberculosis and HIV.
<related-object source-id="http://www.ncbi.nlm.nih.gov/entrez/
query.fcgi?cmd=Retrieve&dopt=Expanded&db=nlmcatalog&list_uids=1252893"
source-id-type="url" source-type="book">
<person-group person-group-type="editor">
<name><surname>Jamison</surname>
<given-names>Dean T.</given-names></name>
...
</person-group>
<source>Disease and Mortality in Sub-Saharan Africa</source>
<edition>2</edition><sup>nd</sup>
<publisher-name>The World Bank</publisher-name>
<publisher-loc>Washington, DC</publisher-loc>
<year>2006</year>
<isbn>0-8213-6397-2</isbn>
<size units="page">416</size>
</related-object>
</p>
...
JATS-common0.ent